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【单选题】
下列哪种酶不能用于聚合酶链反应(PCR)( )A.
Taq DNA合成酶
B.
T7 DNA合成酶
C.
引物酶
D.
Klenow片段
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举一反三
【单选题】______, there can be no wind.
A.
The moon having not atmosphere
B.
The moon's having no atmosphere
C.
For the moon to have no atmosphere
D.
The moon having no atmosphere
【单选题】Television in Dr. Hildebrand's eyes is probably ______.
A.
a powerful weapon for knowledge spreading
B.
a favorable means to promote learning
C.
something to distract people's attention
D.
the embodiment of scientific and technological progress
【单选题】In the sentence 'Aircraft Carders are a powerful and extremely flexible part of a nation's defense.' 'flexible' means _____
A.
convenient
B.
easily suitable to new conditions
C.
changeable
D.
quick
【单选题】Advance in science more often than not encounters powerful opposition, ______Darvin’s Theory of Evolution.
A.
as was the case with
B.
such as the case of
C.
as it did with
D.
as in the case of
【多选题】以下说法错误的是
A.
一国拥有的外汇总量就是一国外汇储备。
B.
国际储备管理的首要原则分别是流动性
C.
最早创立的国际金融组织是国际清算银行
D.
新型国际金融市场的经营活动不受任何国家金融法律法规的制约
E.
金币本位制下的波动幅度是黄金输出入点，是人为规定的波动幅度
F.
牙买加体系以货币的购买力平价作为汇率的决定基础
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