题目内容

David got a job in an important New York law office two years after he _________Harvard.

A. graduated from
B. graduated at
C. graduated in
D. graduated to

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Mrs. Smith plans to retire from office as soon as all her children are _________.

A. self-employed
B. self-made
C. self-supporting
D. self-respecting

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A. self-employed
B. self-made
C. self-supporting
D. self-respecting

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A. 1.5RC
B. RC
C. 1.8RC
D. 1.1RC

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A. 电阻有关系
B. 电容有关系
C. 电阻和电容无关
D. 电阻和电容有关系