美国医院使用的编号类型是()。
A.家庭编号
B.关系编号
C.字母-数字编号
D.社会安全编号
E.冠年编号
参考答案:D
—Jenny and Jane's _____ coming to my office. Can you help tofind the girls?
—No problem. They will be here _____.[ ]
A. mothers are; in a moment
B. mother is; at the moment
C. mothers are; right away
D. mother is; in a moment
防止水泥石腐蚀的措施有哪些?