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