问题
单项选择题
中心架或跟刀架的主要作用是（）。
A.增强工件的强度
B.增强工件的刚性
C.增强刀具的强度
D.增强刀具的刚性
答案
参考答案：B
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中心架或跟刀架的主要作用是（）。
A.增强工件的强度
B.增强工件的刚性
C.增强刀具的强度
D.增强刀具的刚性
参考答案：B
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| Wu Yang gets 1 late. He rides his bike to the school quickly. He doesn't look 2 the traffic (交通) lights, so he hits (撞) a 3 . The driver 4 him to hospital right now. The doctor looks over Wu Yang very carefully (仔细地). Wu Yang wants to go to 5 but the doctor and the driver 6 him to stay in bed. "Now my boy," says the doctor. "Could you 7 me your name, please?" "What are you going to do?" asks Wu Yang. "I'm going to tell your parents and your 8 ." answers the doctor. "But my parents 9 my name and my teacher knows my name, 10 ." says Wu Yang. | ||||
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