单项选择题

What does "the practical manifestations out of control" (Par

A．3) meanA. Technology is losing its traditional practicality.B. Technology is moving further away from science.C. Technological progress is benefiting the whole world.D. Technology is threatening the existence of human civilization.
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单项选择题
In which of the following ways are the mentioned chemical reactions and tunneling reactions alike
A．In both, reacting molecules have to rise over the barrier between the two wells.
B．In both types of reactions, a transition is made from the bottom of one potential well to the bottom of another.
C．In both types of reactions, reacting molecules are able to go through the barrier between the two wells.
D．In neither type of reaction does the rate of a chemical reaction depend on its activation energy.
单项选择题
The historians as mentioned in the last paragraph regard the technology with ______.
A．absolute enthusiasm
B．total indifference
C．obvious resentment
D．reserved approval
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