反萃脉冲旋转阀断的处理措施有()。
A、停脉冲循环泵
B、将塔中苯己顶出
C、将己水送往苯汽提塔
D、更换旋转阀
参考答案:A, B, C, D
will the film begin? In ten minutes.
A. How often B. How soon C. How long
严重骨盆骨折,内出血量可达全身血量的:()
A.20%~30%
B.30%~40%
C.40%~50%
D.50%~60%
E.60%以上