当夏季风盛行时,我国东部大部分地区的气候特点是( )
A:高温多雨
B:寒冷干燥
C:温和少雨
D:炎热干燥
如图,AB是⊙O的直径,点F,C是⊙O上两点,且AF∧=FC∧=CB∧,连接AC,AF,过点C作CD⊥AF交AF延长线于点D,垂足为D.
(1)求证:CD是⊙O的切线;
(2)若CD=23,求⊙O的半径.
南亚的粮食作物以种植( )为主.
It's said that there are plenty of hotels in that town. There ____________ be any difficulty for you to find somewhere to stay.