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【多选题】
1980年5月中央决定设立的四个经济特区是A.
汕头
B.
珠海
C.
广州
D.
厦门
E.
深圳
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举一反三
【简答题】把下列句子重新排序,使其成为一个合理的对话 1.Well, I’d like to walk if it is
within walking distance. 2. And then? 3. Excuse me, sir. I would like to go
to Home Inn. Would you tell me how to get there? 4. All right. Go ri...
【简答题】设 是两组样本观测值,且有如下关系: 试求样本均值 间的关系。
【简答题】冷弯检验是：按规定的________和________进行弯曲后，检查试件弯曲处外面及侧面不发生断裂、裂缝或起层，即认为冷弯性能合格。[填空(1)] [填空(2)]
【单选题】听力原文：M: I bought a few books at the new bookstore. Would you like to have a look at them? W: A few? It looks like you bought out the bookstore. Q: What does the woman mean? (8)
A.
She didn't like the books the man bought.
B.
There wasn't a large selection at the bookstore.
C.
The man bought a lot of books.
D.
She wanted to see what the man bought.
【单选题】设抽样得到10个样本观测值如下：19.1 20.0 21.2 18.8 19.6 20.5 22.0 21.6 19.4 20.3,则样本方差为___________.
A.
1.165
B.
1.142
C.
1.213
D.
1.152
【单选题】Directions: The following passage is about Bus tours in New York and it is followed by five statements. Read the passage, and decide whether the statements are true or false. Without a doubt, New York...
A.
True.
B.
False.
【简答题】In recent years, there has been a sharp growth in the number of tour operators who offer tours led by expert guides, and such holidays are often enhanced by special access to private collections, or a...
【单选题】设抽样得到10个样本观测值如下：19.1 20.0 21.2 18.8 19.6 20.5 22.0 21.6 19.4 20.3,则样本均值为___________.
A.
20.25
B.
20.0
C.
19.85
D.
19.68
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