若|a|=4，|b|=8，则|a﹣b|=（ ）．
4或12
You can't wake a person who is pretending __________.[ ]
A. to be asleep
B. be asleep
C. being asleep
痛风患者起居调护中不应（）
A.保暖
B.过劳
C.防潮
D.户外大量活动
E.充足睡眠
