创伤现场急救技术()。
A、止血、包扎、固定、搬运
B、止血、包扎、固定、等待医护人员
C、止血、包扎、等待医护人员
D、止血、固定、等待医护人员
参考答案:A
If there were no examinations, we should have _______ at school. [ ]
A. the happiest time
B.a more happiest time
C. much happiest time
D.a much happier time
什么叫做供水管道的流速?