C.若此图表示洋葱根尖分生区细胞.应去掉的结构为5.9——青夏教育精英家教网—

0 49103 49111 49117 49121 49127 49129 49133 49139 49141 49147 49153 49157 49159 49163 49169 49171 49177 49181 49183 49187 49189 49193 49195 49197 49198 49199 49201 49202 49203 49205 49207 49211 49213 49217 49219 49223 49229 49231 49237 49241 49243 49247 49253 49259 49261 49267 49271 49273 49279 49283 49289 49297 447090

C.若此图表示洋葱根尖分生区细胞，应去掉的结构为5、9

试题详情

B.图中能利用尿嘧啶核糖核苷酸的结构有3、5、6

试题详情

1．右图为细胞亚显微结构示意图，下列有关说法不正确的是

A.此图可用来表示低等植物细胞的亚显微结构

试题详情

--- Hello, I’m wondering if you have a single room available at present.
   A. With pleasure.   B. What’s up?   C. At your service. D. Who is it?
答案是C。A意思是“乐意帮您这个忙”，常用于答应帮某人忙；B意思是“怎么了”，常用于询问有什么麻烦事发生；C意思是“随时恭候您的吩咐”，常用于侍者或接待人员的招呼语；D询问的是“谁在打电话”，与题意不符。在解答这类情景交际题目时，看清前后文的具体语境很关键。要善于体会说话人之间的关系亲疏、语气是否客气等。
2、一些习惯用法或固定搭配中的冠词。例如：
---Would you like to go to _____ cinema with us?
   ---I would love to, but I have too much work at ____ hand.
   A. the, the         B. a, a       C. the, \    D. \, the
答案是C。这两个短语都是固定搭配。应对这类题目，要注意平时对于语言基础知识的积累与记忆，而且对习惯用法等的记忆尤其要注意细节。
3、名词或名词短语辨析。例如：
1）Judging from his facial _______, he is content with the new project.
   A. expression     B. expedition      C. explanation    D. experience
答案是A。此题考查的是词形相似的名词之间的辨析。还有很多题目设计的考点是词义相近的名词的辨析。这就要求考生在考前复习时再熟读《考试说明》中的高考词汇表，重点关注词形或词义相近的名词间的辨析。
2）--- What’s your ______ being late this time?
   --- I’m sorry, but I ______ a former classmate on my way.
   A. reason of, met          B. cause of, came to
C. excuse for, came across   D. explanation for, meet with
答案是C。此题考查的是名词的短语搭配和动词短语辨析，并穿插了时态的考查，要求考生不仅有扎实的知识基础，还要对题目所给信息有综合而犀利的判断能力。解这类综合题目的最佳方法是排除法和比较法，即认真比较四个选项间的区别，根据题目所给信息对不符合题意的选项进行排除。
4、代词用法。例如：
I’d appreciate _____ if you tell me in advance what time exactly you will arrive.
   A. it      B. that    C. one    D. the one
答案是A。此题考查it用作形式宾语的用法以及it, that, one 在指代前文提过的事物时的用法。这两点都是高考常考的考点。
5、形容词和副词用法。例如：
   --- Have you seen the robber ______ ?
   --- Why ask me? You are the only one who stands _____ to him.
   A. clear, close    B. clearly, closely   C. clear, closely    D. clearly, close
答案是D。此题考查的是形容词和副词的用法。这部分内容中要注意“close”与“closely”、“high”与“highly”、“deep”与“deeply”等几对词语的区别。比较级的用法和倍数的表达法以及一些常用短语也是这部分内容的考点。
6、介词与介词短语用法。例如：
_______ your help, I would have failed to meet the deadline.
A. With     B. For    C. Without   D. Due to
答案是C。此题考查介词与虚拟语气的用法。对介词的考查经常与对名词、动词、形容词的短语搭配的考查结合在一起。故考生需要在记忆常用短语时多关注介词搭配和不同搭配的不同含义。
综上所述，单选题目既要求考生对英语语法知识、词语知识的记忆、理解、掌握和运用能力，又要求根据题干所给的语境条件进行分析、对比，灵活地运用各项英语基础知识。考生不仅要做好基础知识的积累，还要通过大量的练习掌握一定的答题技巧，才能提高答题的准确率。

[考点演练]
1).He can’t remember exactly when his friend Victor went back to ___UK. He only remember it was ____ Friday.
A. the, the;   B. a; the   C. a; a     D. the; a
2). Computers of this kind _____ well.
A. sell        B. sells   C. are sold     D. is sold
3). It is the young man ____ looked for _____ caught the murder.
A. that; who   B. that; they
C. they; that   D. they; which
4). If you carry on working like this, you will ____ sooner or later.
A. break down          B. give up   C. get down            D. hold on

5). This film is ____ boring, it is in fact rather exciting and fascinating.
A. anything but       B. nothing but C. no more          D. all but
6). He ____ full marks, but he was so careless as to make a spelling mistake.
A. must have gained     B. can have gained C. could have gained    D. must gain
7). Only when____ possible to settle the problem .
A. does the headmaster come will it be
B. the headmaster comes will it be
C. has the headmaster come it will be
D. the headmaster comes it will be)
8). ---- $500, but that is my last offer.
----- Ok, it is a _______.
A. cost        B. price     C. reward     D. deal
9). A young man came ____ to the bus stop only ___ the bus had gone.
A. running; to find B. to run; to find C. and run; found   D. running; finding
10). Pears are usually sold by _____ weight and eggs are sometimes sold by ____dozen.
A. the ; the          B. /; a   C. /; the       D. the; a
11). He instructed I ___ the secret until I was told to.
A. must let out B. must not let out
C. should be let out D. not let out
12). He came ____ to the dead dog which he found and watched it _____.
A. close; close   B. closely; closely
C. closely; close    D. closer; closely
13). It was in Lianyungang ______ is a beautiful city ___ Zhangming spent his childhood.
A. which; that   B. that; which   C. which; which D. that; in which
14). I seized Tim by both his hands _____ he appeared in the street.
A. at moment     B. the moment   C. at moments    D. at that time
15). _____ hot, Jim uncovered his quilt, ____ only his stomach____.
A. Feeling; leaving; covered     B. Felt; left; covered
C. Feeling; left; covered        D. Felt; leaving; covered
16). He brought a white T-shirt and a red skirt. Such ___ the gift he gave me when he came back from the USA.
A. is      B. are        C. was       D. were
17). It is ____ work of art that everyone wants to have a look at it.?
A. a so unusual    B. such an unusual ?
C. so unusual    D. such unusual?
18).It’s only ____ 20 minutes’ ride from here to ____ Stone Company.?
A. a; the   B.不填；a    C.不填；the D. the; 不填
19).―Believe it or not, Jack came out ______ first in 100-metre race.
―You mean ________ shortest boy runs ________ fastest.
A.×; the; ×       B. the; the; the   C.×; ×; the       D. the; the; ×
20). ―Can I help you?
―I’d like to buy a present for my father’s birthday, ____ at a proper price but of great use.
A. one    B. anyone   C. that        D. everything
21). This is a _ ___building, which is about ____ high.
A. six-storey; 38 metre     B. six-storeys; 38-metre
C. six-storeyed; 38 metres   D. six-storey; 38-metres
22). Our new house is very _____ for me as I can get to the office in five minutes.
A. convenient     B. comfortable    C. natural      D. helpful
23). So far, several ships have been reported missing _____ the coast of Bermuda Island.
A. off   B. along C. on D. around
24）--- Good morning, Grand Hotel.
---- Hello, I’d like to book a room for the nights of the 18th and 19th.
---- __________.
A. What can I do for you?    B. Just a minute, please.
C. What’s the matter?       D. At your service.
25). She left him, ____ never ________ foot in that house again.

A. determined; to set B. being determined; to put
C. determining; to set  D. determined; place
26). The sun was shining brightly, _____ everything there ________ more beautiful.
A. making; look B. to make; looked C. and made; looking D. and making; be looked
27). English is a language that many people around the world ____ not speak perfectly but ____ at least understand.
A. may, can      B. would, might      C. will, must      D. could, might
28). John ____ such a thing about you. He never speaks ill of you behind your back.?
A. can’t have said   B. might not have said?   C. couldn’t say    D. mustn’t have said?
29). What would have happened ______ , as far as the riverbank?
A. if Bob has walked farther        B. if Bob should walk farther
C. had Bob walked farther         D. should Bob walk farther
30). It’s strange that they ____ nothing about this matter.
A. should know             B. would know        C. had known                  D. knew
31). If only he ____ me yesterday!
A. had seen       B. would see    C. should see        D. saw
32).---Daisy, _____ where you are so that I can easily find you.
---Yes, Mum. But will you be back soon?
A. leave         B. remain        C. last          D. go
33)．―Have you ____ any information ?
―No, I'm going to _________ the business department.
A．picked up; call at　　B. picked out; call on   C．got; call on　　D .received ; drop in
34). Although many of the houses in the small town _____ still in need of repair, there ____ lots of improvement in their appearance.
A. are; has been  B. is; have been   C. is; are     D. are; was
35). The boy said ____ couldn’t he work out the problem but his teacher didn’t know how to do it.
A. though        B. never   C. hardly              D. not only
36). I just don’t understand ______ that prevents so many Americans from being as happy as one might expect.
A. why it does    B. what it does     C. what it is         D. why it is
37). It will be quite a long time _____ she is back again, so don’t be too cross with her.
A. that   B. since    C. before      D. until
38). ― We were going to be successful, but something went wrong at the last minute.?
― ____,but don’t give up. Try again.?
A. You didn’t mean that           B. I’m sorry to hear that ?
C. Find out the reason            D. Never mind?

试题详情

2）--- You know how Mary reacted to the news? She burst out crying!
   --- Well, you __________ her the news so directly, as it is beyond her expectations.
   A. shouldn’t tell     B. shouldn’t have told   C. needn’t tell    D. needn’t have told
答案是B。本题考查的是情态动词+完成式表示对过去动作或事情的推测或评价。本题中reacted和burst都用的是过去时，证明动作是在过去发生的，现在来评价该不该做过去那个动作，就要用情态动词+完成式。
6、动词的时态和语态。例如：
1）--- I’m sorry, but I have to tell you that I can’t go to your birthday party.
--- Why? You _______.
   A. have promised    B. promised    C. are promising   D. have been promised
答案是B。因为承诺是过去动作，跟现在的事实产生对比，故需强调过去承诺过。此题切记不得使用现在完成时态，因为完成时态指的是过去的动作对现在产生了影响，而题意正好相反，过去的承诺对现在的决定没有产生影响。近几年的NMET单项选择填空题的命题原则是：“突出语境，强化语意，强调运用”。单选的题干内容越来越贴近生活，语言更加灵活。因此要做好这类单项选择题，一定要注意体会语境。
2）The concert _________ raise money for the famine victim.
   A. intends for       B. is intended for    C. is intended to   D. intend to
答案是C。“打算用---来做---”的常用表达形式是： “intend sth for (doing) sth”, “intend sth to do sth”。此题中concert是主语，故应选择被动语态。此题把对语态的考查与对短语动词和主谓一致的考查结合起来，是高考考查的常见形式。因其更综合，更复杂，就更需要考生有扎实的基础知识。
（二）、句型考点：
1、主从复合句（名词性、形容词性、副词性从句）及连接词。例如：
1）Last week our maths teacher set so difficult an examination problem ______ none of us worked out.
       A. that       B. which       C. as      D. who
答案是C。本题考查定语从句的关系代词，关系代词在定语从句中作主语或宾语。work out是及物动词，意为“计算出”，其后应接宾语，这里as作关系代词，和such或so连用。如果本句改为…worked it out，则该题应选为A，构成such…that结构，引导结果状语从句。
2）The spokesman said that the new policy was unfair to his country and ______ they would take some legal steps.
   A. that       B. what        C. whether   D. \
答案是A。本题考查宾语从句的连接词。一个谓语动词后接两个宾语从句时，第二句的连接词（尤其是that）不可以省略。有关各类主从复合句的区别和常用连接词的知识点仍将是高考常考的考点，对此考生要注意梳理基础知识，并在做题时注意题干的细节，不能漏掉任何有助于答题的信息，从而提高答题的准确率。
2、强调句型、省略句型和倒装句型。例如：
1）I don’t remember how many years ago ______ I last showed you around the factory.
A. it was that      B. was it that   C. it was when    D. was it when
答案是A。本题考查强调句和宾语从句的语序。这种几个考点结合起来设计题目的方式在高考题目中很常见。“it was that”是强调句的标志词，句中的宾语从句how many years ago it was that…由强调句it was many years ago that…转化而来。
2）---We are expected to finish the work by 6 o’clock this evening.
---______ if we can’t manage it？
A. What          B. How        C. Why          D. When
答案是A。本题考查省略句型。what if意思是“如果……怎么办；即使……又有什么关系”。相当于一个主从复合句，条件句完整，主句因上下文比较清楚，省略了“will happen”。
3）Only when he got hurt _______ the importance of road safety.
   A. he realized      B. did he realize   C. he has realized D. had he realized
答案是B。本题考查的是倒装句型和句子的时态。only, so引导的内容提前或否定词提前，句子要进行部分倒装。而此句的时态应该是过去时。
（三）、其他考点：
1、情景交际。例如：
--- Hello, Grand Hotel. _______

试题详情

下文对单选设计题目的重难点与常考考点做些分析，希望能有助于同学们的考前复习。
（一）、动词考点：
1、常用的动词的近义辨析。例如：
1）---Could you please _____ me five minutes to discuss this proposal, sir?
   ---Of course, but try to be brief.
   A. afford   B. spare    C. share    D. break
答案是B。afford意思是“负担得起”；spare意思是“抽出，匀出（时间）”；share意思是“与---共享--（share sth with sb）”；break意思是“休息一下”。
2）This product ______ from others in that it is of higher quality.
   A. distinguishes   B. identifies   C. differs   D. distincts
答案是C。distinguish意思是“区别，辨别”；identify 意思是“识别，鉴定”；differ意思是“有别于，区别于”；distinct是形容词，意思是“明显的，独特的”。
2、常用的动词的特殊含义。例如：
1）A heavy snow this winter ______ a good harvest next year.
   A. intends   B. mean    C. promises     D. bring
答案是C。其中promise除了我们所熟知的“承诺”之意，还表示“征兆，预示”。
2）--- Can you imagine his being _____ with murder?
   --- How come? He is such a kind man.
   A. charged   B. accused   C. sentenced   D. arrested
答案是A。其中charge除了我们所熟知的“收费”之意，还表示“控告，指控”。
3、常用动词的短语搭配。例如：
1）--- When and where should I _______?
   --- 6 o’clock tonight at the gate of my company.
   A. put you up   B. set you up   C. pick you up   D. pick you out
答案是C。A意思是“为你提供住宿”；B意思是“建立”，不接某人作宾语；C意思是“搭载”；D意思是“把你挑出来（指认出来）”。
2）--- Congratulations on your moving to the new house!
   --- Thanks. And welcome to visit us someday after we _______.
   A. break down B. settle down   C. put down    D. calm down
答案是B。A意思是“坏掉，垮掉”；B意思是“安顿下来”；C意思是“放下来”；D意思是“冷静下来”。
4、动词的非谓语形式。例如：
1）--- What should we do with the empty bottles?
--- Our teacher advises _______ them.
   A. to sell   B. selling   C. having sold   D. sell
答案是B。advise的常用结构是advise sb to do sth，但没有sb作宾语时，结构即为：advise doing。用于此类用法的词还有：allow, permit等。有些动词后面是固定用doing的，如：imagine, suggest, mind等。有些动词短语也是固定接doing的，如：pay attention to, get down to, devote oneself to等。以上几类词或短语要在复习时注意总结和归纳。
2）Who do you think would be able to solve the problem _______ now?
    A. discussed   B. to be discussed    C. having been discussed   D. being discussed
答案是D。本题选项中罗列了四种非谓语动词的常见形式，特意免除了对被动语态的考查，同学们可以从中清楚地看出非谓语形式作定语的几种情况：to do 表示将要去做某事；doing表示正在做某事；having done表示已经做完某事；done 表示某事已被做完。同学们如能牢记这四种情况的基本意思，并细心体会语境，就能在类似题目的解题过程中得心应手了。
3）_______ from behind, the girl in white looks like an angel.
    A. Seen     B. Seeing         C. To see    D. Having seen
答案是A。此题考查非谓语动词用作状语的情况。此时to do表示目的；doing表示正在进行的伴随情况，与主语间是主动关系；having done表示已经完成的伴随情况，与主语间是主动关系；done表示已经完成的伴随情况，与主语间是被动关系。此类题目的解题关键是判断主语与可选动词间是主动还是被动关系，以及动作是在进行还是已经完成。
5、情态动词的基本含义与完成式。例如：
1）The competition time was too limited, but fortunately our team ______ finish the task right before the deadline.
   A. could       B. would    C. were able to    D. might
答案是C。本题考查情态动词的基本含义与区别。两者同时存在时，can 表示可能性；be able to则更强调有能力完成某事。此类考查的重点还有：might在表示推测时语气最弱； shall用于第三人称的问句中常表示客气地询问第二人称意见，以及shall表示承诺、命令、威胁等语气；would表示过去常常做某事等。