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【单选题】
以下不属于次级代谢产物的是 ( )A.
乙醇
B.
链霉素
C.
生物农药
D.
类激素
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【单选题】Absolute poverty has fallen steadily since the industrial revolution, which is why yesterday's ______ have become today's necessities.
A.
refreshments
B.
accommodations
C.
entertainments
D.
luxuries
【简答题】听音，补全句子。 1. What did he do _________________________? 2. My mother _________________________ yesterday. 3. Liu Tao _________________________ two days ago. 4. Helen has a _________________________. 5. ...
【简答题】比较下列各组化合物的熔点的大小,并做简要解释。 ( 1 ) 和 KCl ;( 2 ) NaCl 和 NaBr 。
【单选题】The proposal that Tom ______ was unanimously approved at the regular board meeting yesterday.
A.
be dismissed
B.
dismissed
C.
was dismissing
D.
was dismissed
【单选题】Which of the following is Not mentioned in the passage?
A.
The sandstorm which ended yesterday morning.
B.
An earlier storm last weekend.
C.
Some sandstorms in the Inner Mongolia.
D.
The sandstorm happening last year.
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