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【单选题】
科学的货币本质观是( )。A.
先制币说
B.
便于交换说
C.
的劳动价值说
D.
国家发明创造说
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【简答题】请将下列英文句子翻译成中文:It is their plasticity at certain temperatures , which gives plastics their main advantage over many other materials .
【简答题】请将下列英文句子翻译成中文: He is quick to criticize his staff and hates to be quesitoned about decisions he has made.
【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】请将下列英文句子翻译成中文: The common metallic materials possess the metallic properties of luster , thermal conductivity, and electrical conductivity ;are relatively ductile; and some have go...
【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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