题目内容

I enjoy _______ for this company because they take care of their employees as well as their customers.

A. working
B. worked

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The job market for college graduates is improving _______, according to a recent report.

A. slow
B. slowly

营养物质满足维持需要是的生产效率为()。

A. 0
B. 50%
C. 80%
D. 100%

绝食代谢产热量一般()基础代谢产热量。

A. 高于
B. 低于
C. 等于

鸡的胃肠道排空时间一般为()小时。

A. 24
B. 36
C. 48
D. 72

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