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【单选题】
根据《中华人民共和国仲裁法》的规定，当事人对仲裁协议的效力有异议的，如果一方当事人请求仲裁委员会对仲裁协议的效力作出决定，而另一方请求法院作出裁定的，由( )作出决定或裁定。A.
仲裁委员会
B.
人民法院
C.
仲裁委员会或人民法院
D.
最先收到中请的机构
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【简答题】Scientists think they have _____ in their attempt tofind the causes of some major dieases. A. broken through B. worked out C. fallen out D. gotround
【简答题】请将下列英文句子翻译成中文: (1) Efficiency and mechanical advantage are used to gauge the performance of mechanical machine .
【简答题】Many scientists have been probing psychological problems（ ）
【简答题】Within ten years scientists will probably have
【简答题】Scientists have to work hard to keep _____ with moderndiscoveries and developments. A. company B. track C.touch D. pace
【简答题】For years scientists have been worried about the ___________ of air pollution on the earth’s natural conditions. A. effect B. result C. account D. cause
【单选题】For years scientists have been worried aboutthe ___________ of air pollution on the earth’s natural conditions.
A.
effect
B.
result
C.
account
D.
cause
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