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【单选题】
曲柄摇杆机构( ) A .不能用于连续工作的摆动装置 B .连杆作整回转,摇杆作往复摆动 C .只能将连续转动变成往复摆动 D .可将往复摆动变成连续摆动A.
．不能用于连续工作的摆动装置
B.
．连杆作整回转，摇杆作往复摆动
C.
．只能将连续转动变成往复摆动
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