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问题 选择题

They would like to gratefully _____ the contribution of time and effort by the following compames. [ ]

A. admit

B. acknowledge

C. admire

D. accept

答案

答案：B

选择题

Measures have been taken to fight ________recurring food safety problems, but there is still a long way to go before China can rid itself ________ these issues.

A．for; of

B．for; from

C．against; of

D．against; from
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选择题

实验室中下列物质因没有密封保存而使质量减少的是

A．浓硫酸

B．生石灰

C．烧碱

D．浓盐酸
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