病毒性心肌炎患儿在恢复期限制其活动量的时间应不少于（）
A.1个月
B.3个月
C.6个月
D.9个月
E.12个月
参考答案：B
若3＜a＜4时，化简|a﹣3|+|a﹣4|=[ ]
A．2a﹣7
B．2a﹣1
C．1
D．7
After going through a lot of things in my life, I decide to ______ my feelings on paper.
A．set down
B．calm down
C．pack up
D．add up
