单项选择题

X射线产生条件：高速运动的电子流和阻碍物。
A、正确
B、错误

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Rabbit Psoroptes mostly occurs in winter and early spring.
A.正确
B.错误
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What are not Specific Measures to Transform Government Functions （ ） A、 Improve the macro-control system and reduce government intervention B、Protect the world's peace C、 Strengthen market supervision and improve the market economy system D、Simplify administration and delegate powers
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