集合A={-1,0,1},B={y|y=ex,x∈A},则A∩B=( ).
A.{0}
B.{1}
C.{0,1}
D.{-1,0,1}
答案:B
B=,∴A∩B={1}
句型转换.按要求完成下列句子,每空一词。
1. My grandfather loves to live in the countryside. (改为同义句)
My grandfather enjoys ________ in the countryside.
2. Would you mind opening the windows? (改为否定句)
Would you mind ________ ________ the windows?
3. He got two gold medals in the 2008 Beijing Olympics. (对画线部分提问)
________ ________ gold medals ________ he get in the 2008 Beijing Olympics?
4. James Naismith invented basketball in 1891. (对画线部分提问)
________ ________ James Naismith ________ basketball?
5. Miss Wang's brother is also a teacher. (改为同义句)
Miss Wang's brother is a teacher ________ ________.
下列实验现象,叙述正确的是( )
A.磷在空气中燃烧产生大量白雾
B.铁丝在空气中剧烈燃烧,火星四射
C.硫磺在空气中燃烧,发出微弱的淡蓝色火焰
D.氢气在氧气中燃烧,发出明亮的黄色火焰