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【判断题】
云南是直立亚灌木。A.
正确
B.
错误
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【单选题】–May I go to the concert with you? – I’m afraid not ______you have a ticket, because I have only one.
A.
since
B.
if
C.
unless
D.
though
【单选题】–May I have a look at your new iPad mini? –_______________
A.
Sure, here you are.
B.
You are welcome.
C.
Hold on, please.
D.
I agree with you.
【简答题】如将变压器误接到等电压的直流电源上时，由于空载电流将（），空载损耗将（）
【简答题】–May I have ____ ____? –My name is Jim White.
【单选题】–I _______ as the manager in this company. –May I know since when?
A.
worked
B.
had worked
C.
have worked
D.
am working
【单选题】用 LED 做 12V 电源指示,已知 LED 正向压降为 2.2V ,电流为 5mA 左右,则限流电阻应选 ( ) 为宜。
A.
200 Ω
B.
560 Ω
C.
1.8k Ω
D.
3.6K Ω
【单选题】– May I have an apple, Mum?--Certainly. But you ______ wash your hands first.
A.
may
B.
must
C.
can
D.
need
【单选题】–May I drink water? –Sorry, I don’t have__________.
A.
any; some
B.
some; any
C.
some; some
D.
any; any
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