It's so dark and cold outside. You'd better _______ now.
A:go out
B:don't go out
C:not go out
同学们正处于青春期,下列关于青春期说法正确的是( )
某地以东为东半球以西为西半球,当地有太阳直射现象,以北无直射现象,这点是( )
当x∈(1,2)时,不等式x2+1<2x+logax恒成立,则实数a的取值范围为( )