Helen lacks _________. I’ve never known anyone so unsure of herself.
A. capacity
B. faculty
C. judgment
D. confidence
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Ann has a fine reputation for being an old hand ______ cooking Italian food.
A. on
B. at
C. for
D. in
三相变压器绕组为D联结时，绕组相电流乘以 就等于()
A. 线电流
B. 最大电流
C. 相电流
The ants, ________, have their times for play.
A. hardworking as are they
B. as they are hardworking
C. hardworking despite they are
D. hardworking as they are
I really don’t want to go tonight and I’m trying to _______an excuse.
A. think out
B. think about
C. think over
D. think up
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