A:发射航天飞机
B:水力发电
C:太阳能供热
D:风力发电
关于声的说法正确的是( )
已知函数fx的定义域为3-2a,a+1,且fx+1为偶函数,则实数a的值可以是( )
阅读下面材料,从每题所给的A、B、C、D四个选项中选出最佳选项。
The two girls and one boy are very popular in their countries(国家). Do you know them?
Name
Information
Harper Beckham
Fr om: England
Age: five
She can dance.
She can play the piano(钢琴).
She likes nice clothes(服装).
Suri Cruise
From: America
Age: ten
She likes nice clothes.
Wang Yuanye
(English name: William)
From: China
He can speak English.
He likes reading books.