题目内容

His business was very successful, but it was at the ______ of his family life.

A. consumption
B. credit
C. exhaustion
D. expense

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The second largest racial and ethnic group in the United States is

A. the White.
B. the Hispanics.
C. Chinese.
D. the Blacks.

当偏心的作用力在截面外时,一般为大偏心,中性轴也位于截面外。与此相反,小偏心受压柱的中性轴在截面内。( )

A. 对
B. 错

肾精不足、肾气不固、肾虚水泛的共同表现是

A. 腰膝酸软
B. 眩晕耳鸣
C. 梦遗失精
D. 精神倦怠
E. 浮肿少尿

Please do not ______ to contact our office in case of any difficulties. We are always ready to help.

A. hesitate
B. delay
C. stop
D. postpone

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