由题意可得,1+cosx≠0
即cosx≠-1
所以,x≠π+2kπ
故答案为:{x|x≠π+2kπ,k∈Z}
—Did your parents go to the museum yesterday?
—No. We ______stayed at home watching TV.
A.either
B.all
C.both
D.no one
大多数的人对婚前性行为的态度,是()的。