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【单选题】
立柱支承着承载的横梁，如图A.
(a)所示。各横梁将其所承受的载荷的一半传递到每一根立柱上，于是立柱受力简图如图
B.
所示。已知立柱横截面的尺寸为200mm×200mm，传递到立柱上的载荷
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举一反三
【单选题】We carved their names on the stone so that younger generations could know what their forefathers______for the nation.
A.
did
B.
were doing
C.
had done
D.
have been doing
【单选题】From the this passage, we know that______.
A.
most of the married women don't care for their families
B.
every family prefers to have only one child
C.
the American family has changed a lot
D.
American parents expect their children to go to college
【单选题】From the last paragraph, we know that the hippie movement finally declined because most of the hippies
A.
turned to more active ways to reform. the society.
B.
deemed the social problems of their time incorrigible.
C.
simply dropped out of it as they grew older.
D.
gave up some of their original ideas.
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