单项选择题
The study also notes a
steady
decline in the number of college students taking science courses.
A．relative
B．general
C．continuous
D．sharp
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单项选择题
He asserted that nuclear power was a safe and non-polluting energy source.
A．maintained
B．recommended
C．considered
D．acknowledged
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单项选择题
At that time, we did not fully grasp the significance of what had happened.
A．give
B．attach
C．lose
D．understand
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