烧伤临床常用的磺胺米隆溶液的浓度是
A.3%B.以上都不是C.5%~10%D.20%E.1%
参考答案:C
If our parents do everything for us children, we won't learn to depend on _____.[ ]
A. themselves
B. them
C. us
D. ourselves
需要根据具体情况确定合适的防烟分区大小,每个防烟分区的面积不宜大于()m2。
A.200
B.500
C.1000
D.2000