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【单选题】
用伏安法测量某一阻值略小于200Ω的电阻,要求测量结果的不确定度最小,应选择下列哪组仪器(不计内阻影响和功率限制):
A.
电流表0.1级、量程10mA,电压表1.0级,量程2V
B.
电流表0.5级、量程50mA,电压表0.5级,量程2V
C.
电流表1.5级、量程10mA,电压表1.5级,量程2V
D.
电流表1.5级、量程15mA,电压表1.5级,量程2V
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【单选题】We our breakfast when an old man came to the door.
A.
just have had
B.
just had
C.
have just had
D.
had just had
【简答题】As far back as 700 B. C, man has talked about children being cared for by wolves. Romulus and Remus, the legendary(传说的)twin founders of Rome, were said to have been cared for by wolves. It is believed...
【单选题】As far back as 700 B.C., man has talked about children being cared for by wolves. Romulus and Remus, the legendary twin founders of Rome, were purported to have been cared for by wolves. It is believe...
A.
d edicated
B.
scientific
C.
wonderful
D.
absurd
【单选题】We had our breakfast ___ a quarter ___ seven. 
A.
/ , to
B.
in , to
C.
at , to
D.
on , to 
【单选题】We __our breakfast when an old man came in.
A.
just have had
B.
have just had
C.
just had
D.
had just had
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A.
He knew that there were no fish in the stream
B.
He did not think David was good at fishing
C.
He admired the young man’s great interest in fishing
D.
He did not like the way David talked to him
【单选题】We()our breakfast when the pilot came on board.
A.
just have had
B.
just had
C.
have just had
D.
had just had
【单选题】The old man ____ on and on and attracted a large crowd.
A.
spoke
B.
talked
C.
said
D.
voiced
【单选题】Cathy was shocked to ______ the death of the old man, with whom she had talked the day before.
A.
learn about
B.
learn from
C.
learn off
D.
learn on
【单选题】they ______me a story about an old man living in the countryside.
A.
talked
B.
spoke
C.
told
D.
said
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