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【单选题】
Risks associated with nuclear power ______.A.
can only occur at the plant Site
B.
may occur when wastes are transported or recycled
C.
are limited to structural problems within the plant
D.
are primarily a result of carelessness
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【单选题】Confronted with the complex international situation, we need a foreign policy that is more ____.
A.
symbolic
B.
confidential
C.
controversial
D.
flexible
【简答题】设计滚子从动件盘状凸轮轮廓廓线时，若将滚子半径减小，那么凸轮图形廓线上各点曲率半径______。
【单选题】Confronted with the new groups of cosmic reality, many educated men ______.
A.
become ignorant savages again
B.
find the 'time barrier' unbearable
C.
will not combine solar and stellar space
D.
cannot adapt to the abrupt change of scale