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【单选题】
设φ 1 (x)，φ 2 (x)为一阶非线性微分方程y"+P(x)y=Q(x)的两个线性无关的特解，则该方程的通解为( )．A.
C[φ\r\n 1 \r\n(x)+φ\r\n 2 \r\n(x)]
B.
C[φ\r\n 1 \r\n(x)-φ\r\n 2 \r\n(x)]
C.
C[φ\r\n 1 \r\n(x)-φ\r\n 2 \r\n(x)]+φ\r\n 2 \r\n(x)
D.
[φ\r\n 1 \r\n(x)-φ\r\n 2 \r\n(x)]+Cφ\r\n 2 \r\n(x)
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举一反三
【单选题】Would you like to have some desserts?
A.
I ’ d like some beer.
B.
No, thank you.
C.
Baked beef.
D.
Well-done, please.
【单选题】—I'd like to have some lunch but I have to stay here doing my work. —___________ what you want and I can get it for you.
A.
To tell me
B.
Telling me
C.
If you tell me
D.
Tell me
【单选题】•Read the information about commercial banks. •Choose the best word to fill in each gap, from A, B or C. •For each question 29-40, mark one letter (A, B or C) on your Answer Sheet. Commercial Banks (2...
A.
In
B.
By
C.
At
【单选题】Would you like to have some desserts?
A.
Great.
B.
Well-done,please.
C.
Baked beef.
D.
No, thank you.
E.
I ’ d like some beer.
【单选题】听力原文：W: Good morning. Can I help you? M: Yes please. I would like to have some information about the .. erm.. the course at Swan School. W: Is that a summer course you’re interested in? M: Yes, please...
A.
At an accommodation office,
B.
At a swimming school.
C.
At a summer school.
D.
At Oxford.
【简答题】路由接口的类型有 和 两种
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