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【单选题】

汽车转弯行驶时,差述器中的行星齿轮( )

A.
自转
B.
公转
C.
不转
D.
边自转边公转
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参考答案:
参考解析:
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举一反三

【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...

A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.

【单选题】汽车转弯时外轮压线的错误操作原因是()

A.
转向时机过早
B.
转向时机过晚
C.
转弯后未及时回转方向

【单选题】汽车转弯时,人总是要倒向车的外侧,这是因为

A.
地转偏向力的作用
B.
水平气压梯度力的作用
C.
惯性离心力的作用
D.
摩擦力的作用