什么状态的任务单可以分割（）
A.计划
B.确认
C.下达
D.结案
参考答案：A
下列哪种药物易引起体位性低血压（）。
A.利血平
B.胍乙定
C.氢氯噻嗪
D.可乐定
E.硝普纳
The reason he could not go there was his grades were too low. [ ]
A. why; because
B. why; that
C. for which; which
D. for which; 不填
