题目内容

【B10】

A. the amount
B. any amount
C. the number
D. a number

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【B17】

A. as such
B. as that
C. as though
D. such as

听力原文：M: Hey, honey, why do you look so happy？
W: Great news. We just won $400 in the lottery.
M: Wonderful! How do we spend the money？
W: Well, I'm just thinking about it. Can we buy a new microwave stove？
M: With $400, we can afford the most expensive one.
W: Sure, but on second thought, don't you think our washing machine is out of style？
M: Well, that's still affordable. Hey, how about a camera？ Look, we don't have a camera; a camera will give us a lot of pleasure. Why should we spend all our money on family appliance instead of some luxuries？
W: Well, I don't think it's a good idea.
M: Ok, let's think carefully about it.
W: Oh, How about something more exciting and attractive.
M: What is it？
W: Why not buy some jewelry？ I need something that makes me more elegant and beautiful.
M: Well, in my opinion, you are pretty in your plain way.
W: Really, thank you, but I still insist on having a gold necklace.
(20)

A. Salesman and Customer.
B. The manager and the secretary.
C. Good friends.
D. Husband and wife.

【B3】

A. hands
B. brains
C. organs
D. legs

属真核生物染色质中DNA的三级结构的描述是