主轴在转动时若有一定的径向圆跳动，则工件加工后会产生（）的误差。
A、垂直度
B、同轴度
C、斜度
D、粗糙度
参考答案：B
—Once a neighbour accused me ________ playing my radio too loudly .
—Oh, you had the right to defend yourself ______ the charge.
A．of; against
B．for; of
C．against; for
D．for; against
成人肺结核最可靠的诊断依据是
A．低热、咳嗽、乏力、盗汗B．活组织病理性检查，可见干酪性病灶C．胸片有渗出性阴影D．血沉增快E．结核菌素阳性试验
