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【单选题】
下列化合物中酸性最强的是A.
苯甲酸
B.
对甲基苯甲酸
C.
对硝基苯甲酸
D.
间硝基苯甲酸
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【判断题】Catalytic RNAs have the same structural and functional diversity as do protein enzymes; they are, after all, built from only four different subunits. Nonetheless, ribozymes can catalyze many types of ...
A.
正确
B.
错误
【单选题】Judges would make the final ____ as to who should be the winner of the competition.
A.
decision
B.
promise
C.
difference
D.
change
【单选题】The hiring committee will make the final ______ about who to appoint as the new purchasing director.
A.
authorization
B.
determination
C.
consent
D.
conviction
【简答题】A person who has _________ final say in an international company is usuallyinfluential one.
【多选题】All cells have four things in common: cell membrane, DNA and RNA, ( ) and ( ).
A.
cytoplasm
B.
vesicle
C.
mitochondria
D.
ribosomes
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