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【单选题】
根据圆轴扭转的平面假设，可以认为圆轴扭转时其横截面 。A.
形状尺寸改变，直径仍为直线
B.
形状尺寸不变，直径仍为直线
C.
形状尺寸改变，直径不为直线
D.
形状尺寸不变，直径不为直线
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The reason being late for the meeting was his little son fell ill this morning.A．for, thatB．why,
A.
The reason ____being late for the meeting was ____ his little son fell ill this morning. A．for, that
B.
why, that
C.
for, because
D.
why, because
【单选题】The reason being late for the meeting was his little son fell in this morning.A．for; thatB．
A.
The reason ____ being late for the meeting was ____ his little son fell in this morning. A．for; that
B.
why; that
C.
for; because
D.
why; because
【单选题】With his son _____ , the old man felt unhappy.
A.
to be disappointed
B.
disappointing
C.
being disappointed
D.
to disappoint
【单选题】What worried the woman most was ______ to visit her sick son in hospital.
A.
not allowing
B.
not being allowed
C.
not allowed
D.
having not being allowed
【单选题】You ought to be stricter _____ your son; it’s no use only being strict _____ his work.
A.
with; with
B.
in; in
C.
in; with
D.
with; in
【单选题】The reason _____ being late for the meeting was _____ his little son fell ill this morning. [ ]
A.
for, that
B.
why, that
C.
for, because
D.
why, because
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