— Why is it _________ Mr. Smith seldom mentions his childhood?
— Perhaps he suffered a lot in his childhood.
A:不填
B:what
C:how
D:that
下列行为都是人们为了解决某些环境问题采取的措施,哪一项措施最容易导致相反的效果( )
已知函数f(x)=sinωx+acosωx(a>0,ω>0)的图象关于直线x=π6对称,点(2π3,0)是函数图象的一个对称中心,则a+ω的最小值是____
求16和24的最大公因数。
We want to know he will come back, as we are worried about his safety.