完型填空。

    I am 1English boy. My 2is Mike. I am twelve. My sister's name is Ann and we are students. My mother3a teacher. She's a Chinese teacher. My brother's name is Jim. He's five.4 father isn't here. He's 5Xinjiang. I think my family is a good one.​

已知命题p：不等式a²﹣5a﹣3≥3恒成立，命题q：不等式x²+ax+2＜0有解；若p为真命题，q为假命题，求a的取值范围．

下列鉴别氧气和二氧化碳的方法不正确的是（）

There used to be a huge rock ____ ____ ____ ____ the Pearl River.

夏季，在什么地方容易采到蘑菇？（  ）