Miss Zheng always says that it's important for us to _______ the test paper first before we write down the answers.
A:look up
B:look over
C:look through
D:look out
useful advice he has given us !
设Γ={(x,y)|x2﹣y2=1,x>0},点M是坐标平面内的动点.若对任意的不同两点P,Q∈Γ,∠PMQ恒为锐角,则点M所在的平面区域(阴影部分)为( )