泡沫灭火器灭火时,能喷射出大量二氧化碳气体,使可燃物与空气隔绝,达到灭火的目的, 发布时间:2017-08-10 17:49 │ 来源:www.tikuol.com 题型:填空题 问题: 泡沫灭火器灭火时,能喷射出大量二氧化碳气体,使可燃物与空气隔绝,达到灭火的目的,这说明二氧化碳具有______的性质.碳酸钠跟盐酸反应也能产生二氧化碳,请写出反应的化学方程式:______.
题型:填空题 用所给动词的适当形式填空。1. He can _____________ (catch) the ball. 2. They usually _____________ (teach) each other. 3. Jenny often _____________ (buy) some things at the store. 4. We _____________ (go) to a little store this morning. 5. You _____________ (have) fun today. 6. He _____________ (be) a good basketball player. 查看答案