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【单选题】
对平行一级反应A→B和A→C，若初始系统中只有A，则下面描述的特点，哪一点是不正确的（ ）A.
反应的总速率等于两个平行的反应速率之和
B.
两反应的速率常数 和 的比值不随温度而变化
C.
反应产物B和C的量之比等于两个平行反应的速率常数之比
D.
反应物的消耗速率主要取决于反应速率大的一个反应
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【单选题】It can be inferred from the last paragraph that ______.
A.
some NBAC members hesitate to ban human cloning completely
B.
a law banning human cloning is to be passed in no time
C.
privately funded researchers will respond positively to NBAC’s appeal
D.
the issue of human cloning will soon be settled
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B.
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【单选题】It can be inferred from the last paragraph that ______.
A.
some NBAC members hesitate to ban human cloning completely
B.
a law banning human cloning is lo be passed in no time
C.
privately funded researchers will respond positively to NBAC's appeal
D.
the issue of human cloning will soon be settled
【单选题】What is the possible reason of the move to ban Huckleberry Finn from schools?
A.
Some people believe the book is a distortion of the Civil War.
B.
Some people believe the book is a distortion of the black people.
C.
Some people believe the book contain obscene elements.
D.
Some people believe the book advocates racial dominance.
【单选题】Meimei listens to music _____. [ ]
A.
sometimes
B.
sometime
C.
some times
D.
some time
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