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【单选题】
所谓飞机多液压源系统是指：A.
用于传动飞机多个部件的液压系统
B.
液压系统有多个液压泵共同供压
C.
飞机上有多个相对独立工作的液压系统
D.
以上都对
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【单选题】图示结构,发生温度改变如图所示, BC 杆轴向变形对 AB 杆产生的垂直于杆轴线方向的相对线位移( )
A.
符号为正、大小非零
B.
符号为负、大小非零
C.
0
D.
不确定
【简答题】A．Southern manuscripts and letters. B．Signatures of famous Americans. C．Some old books. D．Original products.
【单选题】图示 结构 ,发生温度改变如图所示, AB 杆轴向变形对 BC 杆产生的垂直于杆轴线方向的相对线位移( )
A.
符号为正、大小非零
B.
符号为负、大小非零
C.
0
D.
不确定
【单选题】A tsunami(海啸) happened in some southern Asian countries________ December, 2004.
A.
at
B.
on
C.
in
D.
by
【单选题】The author used the southern dialect to give the story some local______.
A.
feature
B.
flavor
C.
style
D.
taste
【单选题】图示结构,发生温度改变如图所示, BC 杆轴向变形对 AB 杆产生的垂直于杆轴线方向的相对线位移( )
A.
符号为正、大小非零
B.
符号为负、大小非零
C.
0
D.
不确定
【单选题】A tsunami (海啸) _____ in some southern Asian countries in December, 2004. _____ homeless people had to stay in the open air. [ ]
A.
has happened; Thousands of
B.
happened; Thousands of
C.
has happened; About twelve thousand of
D.
happened; Twelve thousands
【简答题】A．Southern manuscripts and letters. B．Signatures of famous Americans. C．Some old books. D．Original products.
【单选题】The author used the southern dialect to give the story some local______.
A.
color
B.
flavor
C.
meaning
D.
feature
【单选题】Some rural people in southern China still use water power to convert grain into flour.
A.
divert
B.
manufacture
C.
transform
D.
thrust
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