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【判断题】
苯环上的1个氢原子被烷基取代而形成的化合物称为一元烷基苯。A.
正确
B.
错误
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【简答题】News came that the relieving force would not be able to come according to the time schedule; the soldiers there had to endure the de______.
【简答题】运算放大器有两个工作区。在 区工作时，放大器放大小信号；当输入为大信号时，它工作在 区，输出电压为到 。A. 线性B. 非线性C. 饱和值
【简答题】News came that the relieving force would not be able to come according to the time schedule; the soldiers there had to endure the de______.
【单选题】According to this passage, a scientist would conceive of a 'table' as being ______.
A.
a solid motionless object
B.
certain characteristic vibrations in 'ether'
C.
a form. fixed in space and time
D.
a mass of atoms on motion
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