读句子,把人物和动作图片搭配起来。
①Mary is going to read a book.____
②Bob is going to buy a pair of glasses.____
③The boys are making a poster.____
④The girls are going to act a play.____
A. B. C. D.
空气中的水蒸气是江河湖海以及大地表层中的水不断地 ____而来的.夜间气温降低时,水蒸气会 ____成小水珠附着在物体上,这就是露水,若附着在空气中的浮尘上,就形成 ____.深秋或冬天,夜晚温度迅速降到0℃以下,水蒸气会直接 ____成固态的小晶体,这就是 ____
阅读下列短文,根据短文内容,从短文后各题所给的A、B、C、D四个选项中,选择最佳选项。
My favourite season….
Matt/UK
My favourite season is spring, because everything is getting new and fresh again. I like having picnics and taking photos with my friends. I don't like autumn, because I know that it's going to be getting cold soon.
Anna/Germany
Autumn is my favourite season. I love the changing of leaves. I like the colours. I love the autumn wind that blows the leaves around. And I often take a walk in that autumn air with a warm cup of coffee. My least favourite season is summer, because it's too hot.
Neil/Canada
I like summer best. It's very cool in my hometown, and it's nice to have a long and sunny summer. There are a lot of outdoor activities you can take part in, such as going camping. My least favourite is winter, because it's pretty cold, and you don't want to go outside.
Kat/US
My favourite season is winter, because there's a lot of snow, and it's very beautiful. When the countryside is covered with snow, it's perfectly white. Also, I love building snowmen with my friends. So I like winter.
下列物质属于纯净物的是( )