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【单选题】
设有关系R1和R2,经过关系运算得到结果S,则S是( )。A.
一个数据
B.
一个表单
C.
一个关系
D.
一个数组
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反馈参考答案：
举一反三
【单选题】听力原文：M: I'm really very sorry, you didn't enjoy the movie. Did your husband feel the same way about it? W: No—quite the opposite. Q: How did the woman and her husband feel about the movie? (8)
A.
He liked it, but she didn't.
B.
She liked it, but he didn't.
C.
Both of them liked it.
D.
Neither of them liked it.
【单选题】It's absolutely unacceptable to sacrifice people's life and health ________ the economic development in any case. [ ]
A.
in hope of
B.
in exchange for
C.
in face of
D.
in need of
【单选题】Husband: Tell you what, dear. I just got promoted. Wife: Really? ______.
A.
Take it easy.
B.
It's unexpected.
C.
You'll work hard later on, I guess.
D.
Oh, I'm thrilled.
【简答题】膜脂不饱和脂肪酸含量越高，植物抗冷性就越______。
【单选题】Husband: Oh, dear, my eyes are really sore. Wife: ______ Husband: Yes, and I've got a runny nose, too. Wife: Hmm, I can see that. Do you suffer from hay fever? Husband: Not usually, no. Maybe ! should...
A.
What's the reason?
B.
How long have they been?
C.
Are they?
D.
Never mind.
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