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【简答题】
图示电路中二极管为理想二极管,二极管 ( 填“导通”或“不导通”), u 0 = V。
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举一反三
【简答题】试指出,并分析图中(就地冷再生机械)养护机械及施工工艺?
【单选题】By the time I left the School, the professor ______ that class for two years.
A.
has taught
B.
had taught
C.
will have taught
D.
will teach
【单选题】It was raining hard, but by the time the class was over, the rain_____.
A.
had stopped
B.
was stopping
C.
stopped
D.
would stopped
【单选题】Nick stayed up really late last night. So this morning he by the time the class began.
A.
had fallen asleep
B.
had showm up
C.
had realized
【简答题】Section B Directions: There are 10 incomplete statements here. You should fill in each blank with the proper form of the word given in the brackets. Write the word or words in the corresponding space ...
【简答题】It is raining hard, but by the time the class is over, the rain (stop) ___.
【简答题】世界地带性土壤的类型及特征?
【简答题】By the time I left the school, the professor __________that class for two years. A．has taught B. had taught C. will have taught D. will teach
【单选题】By the time I left the school, the professor ______ that class for two years.
A.
has taught
B.
had taught
C.
will have taught
D.
will teach
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