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【单选题】
【图片】电路如上，下面描述不正确的是A.
AD7520 为数 - 模转换器。
B.
上面的电路中，集成运放必不可少。
C.
上面的电路中， -8V 的输入信号应尽量精确。
D.
以上描述至少有 1 个不正确。
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举一反三
【单选题】He’s _______ to fail the exam if he doesn’t do any revision.
A.
near
B.
fit
C.
bound
D.
easy
【单选题】— You haven’t lost the ticket, have you? — _________. I know it’s not easy to get another one at the moment.
A.
Yes, I’m afraid not
B.
Yes, I haven’t
C.
I hope so
D.
I hope not
【单选题】— What's your favorite subject? — ______. It's easy and interesting. [ ]
A.
Toys
B.
Math
C.
T-shirt
D.
E-mail
【单选题】—What’s your favorite subject? — _____ . Because it’s easy and interesting.
A.
Toys.
B.
Math.
C.
T-shirt.
【简答题】抽滤,又称为( ),其装置由( )、( )、( )及( )组成。
【单选题】—“Did you have any difficulty in yesterday’s homework?” — “No, in fact I found _____.”
A.
it very easy to do
B.
it very easy done
C.
very easy for doing
D.
very easy to do it
【单选题】Finding information in today’s world is easy.T
A.
15. Finding information in today’s world is easy.The is how you can tell if theinformation you get is useful or not. （天津） A.ability
B.
competition
C.
challenge
D.
knowledge
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