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【单选题】
物体处于稳定的基本条件是（）。A.
重心高、支撑面小
B.
重心低、支撑面小
C.
重心左、支承点偏右
D.
重心低、支承面大
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【单选题】Who is the presiding officer of the Senate when it is in the session?
A.
The President of the United States.
B.
The Speaker.
C.
The Secretary of the State.
D.
The Vice-President of the United States.
【单选题】Who is the person ____ is standing at the school gate ?
A.
who
B.
that
C.
which
D.
whom
【单选题】—Do you know ? —I’m not sure, maybe he is an artist.
A.
who is the man
B.
what is the man
C.
who the man is
D.
what the man is
【单选题】Who is the Mr. Taylor?
A.
He is the owner of a famous Piccadilly arcade.
B.
He is the owner of Piccadilly's famous arcade.
C.
He is the owner of a jewellery shop.
D.
He is the assistant of a jewellery shop.
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