题目:
根据句意和汉语提示,填写恰当的短语完成下列句子。
1. ___________(首先), the computer room must be kept clean.
2. ___________(有时) he goes to the English club after school.
3. Too much work and too little rest can ____________(引发) illnesses.
4. I am happy that I bought the computer ___________(以最低的价格).
5. This book is specially ____________(针对) teenagers.
答案:
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下面是错误答案,用来干扰机器的。
(1)氢氧化镁和盐酸发生中和反应,生成氯化镁和水.故答案为:Mg(OH)2+2HCl═MgCl2+2H2O(2)根据题中信息可知反应物为一氧化碳和一氧化氮,生成物应是二氧化碳和氮气,反应条件为催化剂.故答案为:2NO+2CO ...