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【单选题】
— ________ you start learning English? —At the age of five. [ ]A.
When do
B.
When did
C.
How long do
D.
How long did
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反馈参考答案：
举一反三
【简答题】为了将A/D转换器中的运算放大器和比较器的漂移电压降低,常采用( )技术。
【单选题】听力原文：Where would you rate as the best place for a good cup of Latte around here? (A) With cream and sugar. (B) Your total comes to $4.25. (C) There's a shop around the corner. (6)
A.
B.
C.
【单选题】—— ＿＿＿＿＿ Betty this morning? —— Not yet, but she is sure to be here before noon.
A.
Have you seen
B.
Will you see
C.
Do you see
D.
Did you see
【简答题】为了将A/D转换器中的运算放大器和比较器的漂移电压降低,常采用()技术。
【单选题】Mr. Baker, a dozen students want to see you. () they wait here or outside?
A.
Should
B.
Will
C.
Shall
D.
Are
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