进行现况调查时，要求调查时间为（）
A.一年内
B.连续若干年
C.短时期内或某个时点
D.间隔一定时间重复一次
E.对时间没有要求
参考答案：C
A．Why she should tell her students about her plans.
B．What he plans to do when he’s on sabbatical.
C．Why she can’t take a sabbatical next semester.
D．Why her students probably weren’t surprised by her announcement.
试述急性肺水肿的紧急处理原则。
