We know from the passage that a car can enter a special-purpose lane______.A.by smoothly m

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We know from the passage that a car can enter a special-purpose lane______.

A.by smoothly merging with cars on the conventional lane

B.by way of a ramp with electronic control devices

C.through a specially guarded gate

D.after all trespassers are identified and removed

热搜:a是b的充分条件,b是a的必要条件吗