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【单选题】
计算机在工作中突然停电,( )中的数据将丢失。A.
硬盘
B.
光盘
C.
ROM
D.
RAM
E.
C
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举一反三
【单选题】What is the New Coke like?
A.
It is a traditional can.
B.
It is a new can, With updated red and silver graphics.
C.
It has a red and white look.
D.
The New Coke can is blue.
【简答题】连杆滑块机构的简图如图(a)所示。A处为中间铰链，B处为固定铰链，C处为滑块一滑轨，所有接触面均为具有良好加工精度与润滑的光滑接触面。 P 为主动力，试作连杆AC处于α角时滑块的受力图。
【单选题】What is the new finding concerning the footprints of people living in cities and those living in suburbs?
A.
The two are not at all comparable.
B.
The former are higher than the latter.
C.
The former are similar to the latter.
D.
The latter are higher than the former.
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