锅炉的化学清洗一般分为（）、（）两种。_爱下问搜题

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问题填空题

锅炉的化学清洗一般分为（）、（）两种。

答案

参考答案：酸洗；碱洗

单项选择题

某公司的四位员工在写工作报告的过程中，有以下四种不同的表述，（）做法是合理的。

A.甲反复检查，确信无错后再上交

B.乙确信自己做得好，不检查就上交

C.丙先让同事帮助检查，然后上交

D.丁直接交给上司，视情况再做修改

补全对话，情景问答

选词填空。

afternoon day you science half

A: What __1__ is it today ?
B: It is Friday . What are __2__ lessons today ?
A: Today, we have Chinese at eight o'clock . We have __3__ at nine o'clock and we have maths at ten
     o'clock . I like maths .
B: I don't like maths! We have chemistry at half past eleven. We don't have science today. In the
    afternoon, I have art at __4__ past one and I have an English lesson at half past two. What about you ,
    Betty?
A: We have English at nine o'clock and science at half past ten .
B: And in the __5__ ?
A: We have art and history. I love histoy. It's my favourite lesson.