How many states have an average speed limit of 65 mph (105 km/h) or higher across their major roads?
A. More than two thirds of US states
B. More than half of US states
C. all US states
D. no state
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Which situation of the following is overtaking , usually called “passing,” legal?
A. all four- or more-lane roads
B. on most two-lane roads with sufficient sight distance
C. both of them
D. none of them
How many states or districtshave passed laws requiring seat belts to be used by at least all occupants of the front seats?
A. 49 states
B. the District of Columbia
C. both of them
D. none of them
Which statement of the following is true?
A. Driving licences may be obtained by any UK resident over the age of 15 years , but they can only start driving when they are 17.
B. Holders of provisional licences are allowed to drive on motorways.
C. The provisional licence may be exchanged for a full licence after the holder has passed the practical driving test.
D. A speed limit of 38mph usually applies in built-up areas.
群体是有一定数量的人结合而成，但并不是任何一群人都可以称之为群体。
A. 对
B. 错
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