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【单选题】
行走机构在遇到障碍物或履带卡入石块是允许引导轮后移,越过障碍物后引导轮在()作用下恢复原位。A.
分离
B.
分离
C.
半分离
D.
切断动力
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举一反三
【单选题】The office staff __ gathered to hear the president speak.
A.
will
B.
are
C.
was
D.
has been
【单选题】The office staff______ assembled outside the building to mourn the victims in the earthquake.
A.
is being
B.
has
C.
is
D.
have
【单选题】The office staff ______ gathered to hear the manager speak.
A.
have
B.
is being
C.
has
D.
is
【单选题】The office staff______gathered to hear the president speak.
A.
are
B.
is
C.
has
D.
will have
【简答题】膀胱朝向前上方的部分称（），膀胱的最下部叫（）。
【单选题】The office staff are almost ______ female.
A.
exclusively
B.
absolutely
C.
utterly
D.
relatively
【简答题】主管全国药品监督管理工作的是
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