2.西罗马帝国灭亡以后. 人在它的废墟上建立起许多国家.其中最强大的是 . 查看更多

 

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  It was a Sunday afternoon.It was very   1   and nobody was glad to stay at home.Mike decided   2   and swim in the river.His brother,little Jim,wanted to go with him.“  3   him with you,Mike,” said their father.

  They both arrived   4   the river soon.A lot of people were   5   in it.Mike told Jim to play on the bank(岸) ,and then he jumped into the water.About an hour later(以后) ,Mike swam to the bank   6   a fish in his hands.Jim was very   7  .He found a bottle and put the fish in it.

  That evening little Jim did   8   except(除了) watching the fish.Suddenly(突然) Mike heard Jim   9   in the room.He ran to him and asked,“What is wrong with you,Jim?”

  “The fish has died,” Jim said in tears(眼泪).“I thought it was   10  .So I brought it out of the bottle and put it on the chair.I only wanted it to have a rest.”

(1)

[  ]

A.

warm

B.

hot

C.

cool

D.

cold

(2)

[  ]

A.

go

B.

to go

C.

went

D.

going

(3)

[  ]

A.

Carry

B.

Bring

C.

Take

D.

Catch

(4)

[  ]

A.

at

B.

in

C.

to

D.

on

(5)

[  ]

A.

washing

B.

playing

C.

resting

D.

swimming

(6)

[  ]

A.

catch

B.

carry

C.

bring

D.

with

(7)

[  ]

A.

happy

B.

unhappy

C.

angry

D.

sorry

(8)

[  ]

A.

everything

B.

something

C.

nothing

D.

anything

(9)

[  ]

A.

singing

B.

crying

C.

shouting

D.

laughing

(10)

[  ]

A.

hungry

B.

free

C.

tired

D.

busy

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(10分)植物具有向重力生长的特性,下列是研究根向重力生长机理的两个实验。
实验一:将空白琼脂和含EDTA的琼脂做成帽状,分别套在甲、乙两组玉米胚根的根冠外(示意图如下)。提示:EDTA的作用是去除与其临接部位的 Ca2+

将胚根水平放置培养一定时间后,观察到甲组胚根向重力(下)生长,乙组胚根水平生长。根据上述实验结果,得出实验结论:                               
  实验二:水平放置的胚根弯曲向下生长,与根冠近地侧的Ca2+浓度明显高于远地侧有关。研究表明,根总是朝着Ca 2+浓度高的方向弯曲生长。为验证这一结论,有人设计了下列实验方案。请根据提供的实验材料和用具,写出第二步及以后的实验步骤和实验结果,并回答问题。
(1)实验材料和用具:胚根等长的萌发玉米种子,空白琼脂帽,含EDTA的琼脂帽,上面部分含Ca2+的琼脂帽(水平方向),培养皿等。
(2)实验步骤:
  第一步:取若干个培养皿,在每个培养皿中放置适量的萌发玉米种子,按实验一中乙组的方法处理胚根一定时间后,移去根冠外的琼脂帽。然后将培养皿平均分成两组,编号为 A组、B 组。 
  第二步:                                                            
  第三步:                                                            
(3)实验结果:                                                         
(4)科学家进一步证实,根冠中生长素的分布受Ca2+浓度影响,当胚根水平放置时,重力诱导Ca2+向根冠下侧移动,导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系:                                  

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任务型阅读。

  What is time?Is time the same all over the world?You may say that's an easy question.Wherever(无论哪里)you go,a minutes 60 seconds,an hour is 60 minutes,a day is 24 hours and so on.But in America,time is more than that.Americans see time as a valuable(贵重的)resource(资源).(A)Maybe that's why they are fond of the expression(表达)“Time is money”.

  (B)Americans believe time is a limited(有限的)resource,so they all try hard to save it and use it in an efficient(有效的)way.No one can express the view(观点)better than the early American hero Benjamin Franklin,“Do you love life?Then do not waste(C),for that is the stuff(材料)fife is made of.”

  (D)To Americans,being on time is a way of showing respect(尊重)for others' time.If someone is(E)over ten minutes later than they have planned(计划),he has to say sorry or tell the reason.People who are running late(迟到)often call ahead(提前)to let others know of the delay(延期).The lifestyles(生活方式)of Americans show how much people respect the time of others.When people plan an event,they often set(定)the time several days or weeks before it.Once the time is fixed(确定),it is hardly changed,unless(除非)the situation is critical(紧急的).If people want to come to your house for a friendly visit,they usually ring you up to make sure(确信)you have time and are at home.Besides,(F)大部分美国人不愿意晚上十点以后打电话,without anything important.

  To outsiders(局外人),Americans seem tied to(受……束缚)the clock,while they themselves like plans to be fixed and unchangeable.

  Time is one of life's most precious(珍贵的)gifts.And unwrapping(打开)is great fun.

(1)

(A)句中are fond of的意思是:“________”。

[  ]

A.

讨厌

B.

喜欢

C.

不充分利用

D.

懂得

(2)

将(B)句翻译成汉语:________。

(3)

在(C)处填上一个单词,使句意完整:________。

(4)

将(D)句翻译成汉语:________。

(5)

写出(E)处“over”的同义短语:________。

(6)

将(F)处的汉语翻译成英语:________.

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我们以后不用每天都上学,直接用电子邮件把作业发给老师就可以了。

  We will _______ go to school everyday,we will ________ our homework to the teacher _______ ________.

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