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【单选题】
电路如图 所示,当电源频率升高时,下列描述正确的是( )A.
A1不变，A2不变，A3不变
B.
A1不变，A2变小，A3变大
C.
A1不变，A2变大，A3变小
D.
A1不变，A2变小，A3变小
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反馈参考答案：
举一反三
【简答题】There are beautiful stars in the sky . 改为感叹句 -------- -------- stars there are in the sky !
【简答题】将下列化合物用中英文命名。 (i)CH3CH2CH2Na (ii)CH3CH2CH2Cu (iii)(CH3CH2CH2CH2C2)4Si (iV)(C2H5)2Mg (V)(CH3CH2)2Zn (vi)C6H5MgBr
【单选题】There are a lot of good soccer players, but there are only ______ stars.
A.
a few
B.
a little
【简答题】There are many stars _____ the universe.
【简答题】It was very dark, but Mary seemed to __________________________________ (本能地知道该走哪条路)
【单选题】听力原文：M: How was your interview? W: Very successful. The employer seemed to be very interested in me. Q: How did the woman feel about the interview? (10)
A.
It was a failure.
B.
It was interesting.
C.
She thought she had passed it.
D.
She thought it was hard to tell.
【单选题】There are numerous stars in the sky.
A.
to twinkle
B.
twinkling
C.
twinkled
D.
twinkle
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