A:我们能听到远处的雷声,说明空气可以传声
B:人在岸上大声说话也能惊动水中的鱼,说明水能传声
C:将耳朵贴在长钢管的一端,让他人在另一端敲击一下,你会听到几次敲击声,其中最先听到的声音是通过空气传来的
D:宇航员在太空中不能直接对话,说明真空不能传声
①他巴望自己田里的禾苗长得快些,天天到田边去看。____
②他在田边焦急地转来转去。____
③小明后悔没有听老师的劝告____
明朝“析中书省之政归六部”,六部所掌主要是( )
根据句意、首字母提示或英文解释写出合适的单词。(1)Don't play in the street. It's ____ (not safe).(2) Your blue jeans____ (go well with) with your T-shirt very well.(3) I'm a top student, and I have a healthy ____(the food you usually eat) and lifestyle.(4) People usually think pigs are l____ . They say pigs do nothing but sleep and eat.(5) We don't have e____ food for supper. Let’s buy some from the supermarket.(6) A friend of mine is coming to v____ me this Saturday. I'm looking forward to seeing him.(7) Every year we usually have a party to c____ Spring Festival.