数控机床的Z轴方向_______。
A.平行于工件装夹方向
B.垂直于工件装夹方向
C.与主轴回转中心平行
D.不确定
参考答案：C
"You'll have to wait for two hours, _____ is, at about 11:30, _____ the medical report will come out,"
the doctor said to me. [ ]
A. that; when
B. which; that
C. that; which
D. it; whose
性患者，20岁，肠梗阻术后，血清Na+130mmol／L，C1ˉ98mmol／L，BUN8mmol／L。应考虑与下列哪项因素有关
A．补充了大量等渗盐水
B．水分补充不足
C．补充了大量等渗糖水
D．.补充了足量的钾盐
E．肾功能不全
