Mr Jones, a professor, ___________ for h_爱下问搜题

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问题选择题

Mr Jones, a professor, ___________ for his excellent lectures, is popular with his students.

A．known

B．knowing

C．to be known

D．having known

答案

答案：A

单项选择题

急性智齿冠周炎的治疗方法中应除外

A．局部冲洗上药

B．切开引流

C．配合口服抗生素

D．拔除患牙

E．使用漱口液，保持口腔清洁

单项选择题

圆柱铣刀刃倾角不等于零，切削速度和切屑流出方向都不垂直刀刃，这时实际前角（）。

A.减小

B.不变

C.增大

D.不确定