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【判断题】
根据基尔霍夫电流定律推理,流入或流出任一封闭面电流的总和恒等于零A.
正确
B.
错误
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举一反三
【简答题】I doubt whether he can _______ his efforts much longer as he looks
very tired.A. hold up B. hold on C. keep on D. keep up
【单选题】I doubt whether he can _______ his efforts much longer as he looks very tired.
A.
hold up
B.
hold on
C.
keep on
D.
keep up
【单选题】I do not doubt ________ win in the race.
A.
whether he will
B.
whether will he
C.
that he will
D.
that will he
【单选题】I doubt whether he can ______ his efforts much longer as he looks very tired.
A.
keep out
B.
keep in
C.
keep on
D.
keep at
【单选题】I doubt ______.
A.
whether he can come
B.
if he can come or not
C.
while he will be here
D.
that he will come
【简答题】I doubt whether he can _______ his efforts much longer as he looks
very tired. (4.0分)A. hold up B. hold on C. keep on D. keep up
【单选题】I don’t doubt _____ for the journey by doing jobs on the ship.
A.
that he can pay
B.
whether he can pay
C.
that can he pay
D.
whether can he pay
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