题目内容

适宜回流比应取最小回流比的

A. 1.1~1.5倍
B. 1.1~2.0倍
C. 1.5~2.0倍
D. 1.5~2.5倍

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当回流比增大时,所需塔板数增多

A. 对
B. 错

全回流时理论板数最多

A. 对
B. 错

What is the news report chiefly about?

A. US Navy bans sailors from alcohol use in Japan.
B. US Navy banned all activities of its workforce in Japan.
C. A US sailor on the Japanese island was killed.
D. People in Japan are banned from drinking alcohol.

Why was the US sailor arrested according to the news?

A. Because of the crime he confessed.
Because of the complaint of local residents.
C. Because of the overreaction he made.
D. Because of the suspicion of drunk driving.

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