直径不大的立铣刀、三面刃铣刀、锯片铣刀，一般都采用（）齿形。
A.尖齿铣刀
B.铲齿铣刀
C.镶齿铣刀
D.阶梯铣刀
参考答案：D
Every time she was in trouble, she went to him for help, as he said he ________ do anything for her.
A．should
B．must
C．would
D．might
液压式
