下列哪种刷牙方法对清除龈沟附近和邻间隙的菌斑效果最好()。
A.轻刷法
B.水平颤动法
C.竖转动法
D.重刷法
E.横刷法
参考答案:B
__________ of the students who took part in the military training is 450.
A.A number
B.A lot
C.Lots
D.The number
前列腺癌淋巴结转移最常见()
A.主动脉旁淋巴结
B.髂总动脉旁淋巴结
C.髂外动脉旁淋巴结
D.髂内动脉旁淋巴结
E.闭孔淋巴结