下列各组物质,前者是混合物,后者是纯净物的是
A.淀粉与氯化氢
B.钢与浓硫酸
C.纯碱与汽油
D.胆矾与液氯
答案:A
以下情况应优先处理的是()
A.休克
B.止血
C.窒息
D.骨折
E.颅脑损伤
Mike ______have stolen the money from the bank,______he appeared to be rich overnight.
A.can’t; for
B.might; for
C.must; since
D.can’t; since