CUB={2,4,6,8},则 A∩(∁UB)=
如图S为正三角形ABC所在平面外一点,且SA=SB=SC=AB,E、F分别为SC、AB中点,则异面直线EF与AC所成角为( )
⑴Can we look at the blue jeans?____ A. It's a shirt.
⑵What's this?____ B. They're shorts.
⑶What colour is it?____ C. Here you are.
⑷What are they?____ D. It's yellow.
“风声、雨声、读书声,声声入耳;家事、国事、天下事,事事关心”这幅对联启示我们( )