单项选择题：当旅客列车编组较短时，为了能方便地调节制动力，采用有（）的制动机为宜。A.阶段作用

题型：单项选择题

After twenty years of shaving（剃须）himself every morning, a man in a small Southern town thought he had enough. He told his wife that he intended to let the local barber shave him each day. He put on his hat and coat and went to the barber shop.

The barber's wife, Grace, was working that day, so she performed the task. Grace shaved him, and said, "That will be $20." The man thought the price was a bit high, but he paid the bill and went to work.

The next morning the man looked in the mirror, and his face was as smooth as it had been when he left the barber shop the day before. “Not bad, he thought. At least I don't need to get a shave every day.”

The next morning, the man's face was still smooth. Two weeks later, the man was still unable to find any trace of whiskers on his face. It was more than he could take and he was frightened, so he returned to the barber shop.

"I thought $20 was high for a shave", he told the barber's wife, "but you must have done a great job. It's been two weeks and my whiskers still haven't started growing back." The expression on her face didn't even change, expecting his comment. She responded, "You were shaved by Grace and once shaved, always shaved!"

小题1:It’s implied in the first sentence of the passage that .

A．the man lived a very poor life

B．the man liked shaving himself

C．the man finally got bored of shaving himself

D．the man decided not to shave again小题2:We learn that at first the man thought ＄20 for a shave was .

A．too little

B．too much

C．proper

D．impossible小题3:What can we learn from the passage?

A．Everybody in the town knows Grace.

B．Nobody wants to be shaved by Grace in the town.

C．The man was scared by the result two weeks later.

D．The man’s whiskers grew back at last.

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当旅客列车编组较短时，为了能方便地调节制动力，采用有（）的制动机为宜。A.阶段作用

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