One day Mrs. Smith visited her family doctor. He was an old man with a beard (胡须). "What's tile problem?' the doctor asked her. "I am very worried about my son. Teddy. " Mrs. Smith said. "I can't slop hen From belling(打赌). He spends all his money betting on horse races(赛马). And even worse he'll bet on anything. ft doesn't matter what it is. " The doctor said. "I've saved (挽救) many people from gantline (赌博) before. Send him to me. '
The next day Mrs. Smith sent her san to see the doctor. While they were talking. the boy was looking at the doctor's beard. Suddenly he said. "I bet you S 50 that's not a main beard. bard". "Oh the doctor said. 'Call I pull your beard Lind find out?" the boy said. The doctor thought this was a good way to leach hen a lesson. so he said. "OK. If my beard is main. you will have to pay me $ 50. " The boy pulled it and soon Found out it was real. The doctor laughed.
Two days later the doctor telephoned Mrs. Smith. "l think I've saved your son. " He told her the story. Btu Mrs. Smith said. "You're wrong. You've made him worse. " "How can that be?" "Before
he went to see you. he bet me $100 that you would ask him to pull your beard!"
Teddy's problem was that he liked burling too much.
A.True.
B.False.
第3题
在一垂直安装的管道上,为防止介质倒流,应选用的止回阀为()。
A.节流式止回阀
B.夹塞式止回阀
C.旋启式止回阀
D.升降式止回阀
第4题
在一垂直安装的管道上,为防止介质倒流,应选用的止回阀为()。
A.升降式止回阀
B.旋启式止回阀
C.节流式止回阀
D.夹塞式止回阀
第5题
在一垂直安装的管道上,为防止介质倒流,应选用的止回阀为()。
A.升降式止回阀
B.旋启式止回阀
C.节流式止回阀
D.夹塞式止回阀
第6题
在一垂直安装的管道上,为防止介质倒流,应选用的止回阀为()。
A.节流式止回阀
B.夹塞式止回阀
C.旋启式止回阀
D.升降式止回阀
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