问题 问答题 简答题

造成灰分测定误差的主要因素有哪几个?

答案

参考答案:

造成灰分测定误差的主要因素有三个:

1黄铁矿氧化程度

2碳酸盐主要是方解石分解程度

3灰中固定的硫的多少。

阅读理解

When I tidied up(整理)some old boxes under my bed, I found an old letter for me from my best friend. Her name was Minnie.

In the letter, Minnie wrote, “I am really sorry about before. Tell me if you will be my best friend again and tell me if you accept(接受)my apology . ”I wrote, “YES. I will be your best friend. ”

The twelve-year-old letter made me remember the time that Minnie and I spent together. We often wrote to each other during that time. One minute, Minnie and I would be playing happily together; the other moment we would get into arguments. But things would always be better again. She gave me a doll(洋娃娃)for my tenth birthday. I still keep it.

Finally things changed. We stopped writing letters to each other after she moved away, and I could no longer ride my bike to her house. Years later, she invited me to her sixteenth birthday party. I don’t see Minnie very often from then on. But I’ll always keep the letter and I’ll never forget the time we spent together.

小题1:Minnie wrote the letter to       .

A.say sorry to the writer

B.thank the writer

C.invite the writer to her party

D.say goodbye to the writer小题2:The writer got the letter      years ago.

A.10

B.12

C.14

D.16小题3:The underlined word “apology” means “    ” in Chinese.

A.劝告

B.帮助

C.道歉

D.祝福小题4:Which of the following is TRUE, according to the passage?

A.The writer never had arguments with Minnie.

B.Minnie gave the writer a doll on one of her birthdays.

C.Minnie still writes letters to the writer.

D.The writer often rides her bike to Minnie’s house.小题5:The writer wrote the passage to tell us about her      with Minnie.

A.old boxes

B.letter

C.birthday party

D.friendship

单项选择题