A.Tom likes to study a foreign language.
B.Tom should make his own decision.
C.Tom may pay a visit to France.
D.Tom has not made up his mind.
第2题
A.频率越高,容抗和感抗越大
B. 频率越高,容抗和感抗越小
C. 频率越高,容抗越大,感抗越小
D. 频率越高,容抗越小,感抗越大
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