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【单选题】
电压放大电路首先需要考虑的技术指标是:A.
放大电路的电压增益
B.
不失真问题
C.
管子的工作效率
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举一反三
【单选题】The author is in favor of the opinion that _____.
A.
the reversal of trend caused by scientific advances is out of the question.
B.
nuclear weapons won't play a prominent role in dealings among peoples.
C.
the public is aware of the future dangers and ready to take immediate action.
D.
the trend of rapid development of science and technology seems irresistible.
【简答题】使用机械系统替代原理的具体措施包括( )。 A用视觉、听觉、嗅觉系统代替部分机械系统 B用电场、磁场和电磁场完成与物体的相互作用 C由恒定场转向可变场，由静态场转向动态场 D将铁磁粒子用于场的作用之中
【简答题】静态电磁场包括 ______ 、 ______ 和 ______
【简答题】现有一含氮量为 10 克的蛋白质混合食品,该蛋白质混合食品含有 __________ 克蛋白质。
【简答题】静态电磁场包括 ______________ 、 ______________ 和 ______________ 。
【单选题】As to the greenhouse effect, the author
A.
shares the same view with the scientists
B.
is uncertain of its occurrence
C.
rejects it as being ungrounded
D.
thinks that it will destroy the word soon
【单选题】According to the passage, the primary benefit of the new research is that ______.
A.
scientists can study the pituitary gland for the first time
B.
the procedures are simpler and require fewer laboratory animals
C.
the study of intact laboratory animals has now been rendered obsolete
D.
researchers were able to discover prolactin
【单选题】(The population) of this small town has (more than) (doubled) it in the past (few decades).
A.
The population
B.
more than
C.
doubled
D.
few decades
【判断题】the obvious change over the past decades is the decline of the authority of the roman catholic church. ()
A.
正确
B.
错误
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