题目内容

A.to goB.goingC.goesD.go

A. to go
B. going
C. goes
D. go

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Choset’s snake robots could make more movements than the ones others developed.

A. Right
B. Wrong
C. Not mentioned

在图3.4所示并联电路中,若R=XC=XL,I=10A,则IR,IC,IL和IX各是多少?若I不变,而改变f,则U是增加还是减小?

A.on B.below C.in D.There

A. on
B. below
C. in
D. There

游乐场的溜冰滑道如下图所示,溜冰车上坡时每分钟行驶400米,下坡时每分钟行驶600米,已知溜冰车从A点到B点需要3.7分钟,从B点到A点只需要2.5分钟。AC比BC长多少米?()

A. 1200
B. 1440
C. 1600
D. 1800

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