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【单选题】
用细绳系一小球使之在竖直平面内作圆周运动, 小球在任意位置A.
切向加速度
B.
向加速度
C.
绳子的拉力和重力是惯性离心力的反作用力
D.
绳子的拉力和重力的合力是惯性离心力的反作用力
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举一反三
【单选题】He is a dishonest man. _________ he said to us, we didn’t believe him.
A.
Wherever
B.
Whenever
C.
However
D.
Whatever
【简答题】A．Cowardly. B．Curious. C．Lazy. D．Courageous.
【单选题】We believe him to ___ a mistake that he didn’t accept the invitation to the party.
A.
have made
B.
have been made
C.
be made
D.
making
【单选题】大卫 ( Dàwèi ) 住 ( zhù ) 在 ( zài ) 几 ( jǐ ) 号 ( hào ) 楼 ( lóu ) ?
A.
一 ( yī ) 号 ( hào ) 楼 ( lóu )
B.
二 ( èr ) 号 ( hào ) 楼 ( lóu )
C.
三 ( sān ) 号 ( hào ) 楼 ( lóu )
D.
四 ( sì ) 号 ( hào ) 楼 ( lóu )
【单选题】大卫 ( Dàwèi ) 住 ( zhù ) 在 ( zài ) 哪个 ( nǎgè ) 房间 ( fángjiān ) ? (
A.
505
B.
506
C.
605
D.
606
【简答题】As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. The they become int...
【单选题】We believe him to______a mistake.
A.
have made
B.
be made
C.
have been made
D.
making
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