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单项选择题

电阻R1与R2（R1＞R2)串联时则有（)。

A.I21＞I22
B.I21 U22
D.U21
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After all, Ed"s idea of exercise has always been ______________ effort-taking than lifting a fork to his mouth.
A、no other
B、none but
C、nothing more
D、anything more
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听力原文： When my first wartime Christmas came, I ...
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