My mother often __________ lunch with us.[ ]
A. take
B. have
C. makes
D. has
答案:D
减小轧件头尾尺寸超差的措施是()。
A.短连轧机架间距
B.小张力
C.用较多活套
老年男性,冠心病广泛前壁心肌梗死,充血性心衰,应用硝普钠的机制为()
A.利尿
B.减少血容量
C.增加心肌收缩力
D.降低心脏前后负荷
E.纠正电解质平衡