题目内容

2

A. They are user-friendly.
B. They are newly developed.
C. They are popular abroad.
D. They are of high quality.

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A. It wouldn't start.
B. It ran out of gas.
C. It was broken.
D. It was missing.

A. It has to be charged.
B. It is still new.
C. It is of good quality.
D. It was bought a year ago.

A. To recharge it.
B. To repair it.
C. To return it.
D. To sell it.

A. 能干扰细胞代谢活动的化学物质
B. 是具有滋补营养、保健康复作用的物质
C. 可改变或阐明机体的生理功能及病理状态,以防治及诊断疾病的化学物质
D. 能影响机体生理功能的物质
E. 所有作用都是有益于人体的物质