A:莫斯科战役
B:斯大林格勒战役
C:索姆河战役
D:阿拉曼之战
— What do you think of it?
— Oh, I think it's that I have ever seen.
平面上有6条两两不平行的直线,求证:在所有的交角中,至少有一个角小于30.1°.
You are_______than my sister.( )