与香港最临近的城市是( )
A:广州
B:深圳
C:珠海
D:汕头
热的传递方向是由温度高的向温度低的地方传递。( )
—How was your climbing Mount. Huang?
—I didn't believe I could do it ___________ I got to the top.
定义域为R的偶函数fx满足对∀x∈R,有fx+2=fx-f1,且当x∈2,3 时,fx=-2x2+12x-18,若函数y=fx-logax+1在0,+∞上至少有三个零点,则a的取值范围是( )