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【简答题】
C 1 、C 2 两个电容器，分别标明为“200pF，500V”和“300pF，900V”，把它们串联起来后，等值电容多大?如果加上1000V电压，是否会击穿?
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反馈参考答案：
举一反三
【判断题】A PDM system can help moldemakers improve the efficiency of data management.
A.
正确
B.
错误
【判断题】Application of a PDM system in mold design can help the users to ensure the quality of their products.
A.
正确
B.
错误
【单选题】The musician along with his band members ________ ten performances in the last three months.
A.
gives
B.
has given
C.
have given
D.
give
【单选题】The two newspapers gave different ______ of what happened.
A.
versions
B.
editions
C.
productions
D.
texts
【单选题】—Look ______ the two children, they're Nick and Lily. —Oh, they're twin ______. [ ]
A.
at; brother and sister
B.
/; brothers
C.
of; sisters
D.
after; boys
【单选题】The musician along with his band members _____ ten performaces in the last three months.
A.
gives
B.
has given
C.
have given
D.
give
【简答题】实验发现电子吸收光谱并非线状光谱,吸收峰宽度约为1000—3000cm-1 原因:
【判断题】A PDM system can help moldmakers improve the efficiency of data management.
A.
正确
B.
错误
【单选题】_________you gave me last night are of great use to me. [ ]
A.
The two pieces of advice
B.
The two advices
C.
Two pieces of advice D, Two advices
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