— How many students are there in your school?
— students, I think.
A:Thousand of
B:Three thousands
C:Three thousand
D:Three thousands of
有“咖啡王国”之称的国家是( )
根据所学知识完成题目:
设fx=x3+log2x+x2+1,则对任意实数a,b,a+b≥0是f(a)+f(b)≥0的( )