骨盆骨折应优先处理的是()
A.止痛
B.复位
C.镇静
D.切开复位
E.抢救休克
参考答案:E
Teenagers _____ their health because they play computer games too much.[ ]
A. have damaged
B. are damaging
C. damaged
D. will damage
混凝土中,骨料级配良好的标准是什么?