4.如图,样本A和B分别取自两个不同的总体,它们的样本平均数分别为,样本标准差分别为sA和sB,则 [B]
(A) >,sA>sB
(B) <,sA>sB
(C) >,sA<sB
(D) <,sA<sB
[答案]B
3.函数f (x)=2sinxcosx是 [C]
(A)最小正周期为2π的奇函数 (B)最小正周期为2π的偶函数
(C)最小正周期为π的奇函数 (D)最小正周期为π的偶函数
[答案]C
[解析]因为f (x)=2sinxcosx=sin2x,所以它的最小正周期为π,且为奇函数,选C。
2.复数z=在复平面上对应的点位于 [A]
(A)第一象限 (B)第二象限 (C)第三象限 (D)第四象限
[答案]A
[解析]∵,∴复数在复平面上对应的点位于第一象限.故选.
1.集合A={x-1≤x≤2},B={xx<1},则A∩B= [D]
(A){xx<1} (B){x-1≤x≤2}
(C) {x-1≤x≤1} (D) {x-1≤x<1}
[答案]D
[解析]A∩B= A={x-1≤x≤2}∩ B={xx<1}= {x-1≤x<1},故选.
第二节:
第一节:
Dear editor,
I am Evan from Canada. Being the eldest child in the family has its disadvantages. First of all, I have to share all my ______(玩具)with my younger sisters. Of course, they don’t n____ to return the favor because I’m totally uninterested in their things ._______(除……之外)that, they are always hanging around me. I just can’t get a moment’s p_____.
At meals, I have to eat whatever is _____the plate regardless of the taste .My sisters only try one bite if it’s not ______favorite food. In addition, w____ it comes to practicing our musical instruments,. I have to practice ______than double the time. Worst of all, I get a larger quantity of homework,_____(对比)to them.
I’m feeling rather annoyed. Can you please g_____ me some advice?
Yours truly
Evan Smith
76.toys
77.need
78.Besides
79.peace
80.on
81.their
82.when
83.more
84.compared
85.give
第二节 书面表达(满分25分)
假设你是李华,福建省某中学高中学生,今年暑假将前往澳大利亚参加主题为WATER FOR LIFE“的交流活动。请你以参访代表的身份,根据以下图片提示,用英语写一篇发言稿。
注意:
1. 根据图片的内容适当展开,以使行文连贯;
2. 开头与结尾已写好,不计入总词数;
3. 文中不能出现考生的具体信息;
4. 词数:120左右
参考词汇:短缺 shortage ; 资源 resource
Ladies and gentlemen,
Good morning, I’m Li Hua from Fujian, China, It’s my great honor to be here to say something about the global water shortage and ways of dealing with it.
__________________________________________________________ That’s all. Thank you.
[思路点拨]试题为应用文中的发言稿,是半开放性的试题。对此试题的写作,应从以下几个方面进
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