炭疽热通常有哪几种类型？

结构化程序设计方法的主要原则可以概括为自顶向下、逐步求精、 【2】 和限制使用goto语句。

阅读理解.

     My aunt Edith was a widow (寡妇) of 50, working as a secretary, when doctors discovered

what was thought to be a very serious heart disease.

     Aunt Edith doesn't accept defeat (击败) easily. She began studying medical reports in the library

and found an article in a magazine about a well-known heart surgeon (外科医生), Dr. Michael

DeBakey, of Houston, Texas. He had saved the life of someone with the same disease. The article

said Dr. DeBakey's fees were very high; Aunt Edith couldn't possibly pay them. But could he tell

her of someone whose fee she could pay?

     So Aunt Edith wrote to him. She simply listed her reasons for wanting to live: her three children,

who would be on their own in three or four more years, her little girl was dreaming of traveling and

seeing the world. There wasn't a word of self-pity---only warmth and humor and the joy of living.

She mailed the letter, not really expecting an answer.

     A few days later, my doorbell rang. Aunt Edith didn't wait to come in; she stood in the hall and

read aloud: "Your beautiful letter moved me very deeply. If you can come to Houston, there will

be no charge for either the hospital or the operation. Signed-Michael DeBakey."

That was seven years ago. Since then, Aunt Edith has been around the world. Her three children

are happily married. For her age, she is one of the youngest, most alive people I know—all

because of an open heart surgeon who knew how to honor his profession, and how to open his

own heart.

1. We learn from the reading that ________.

A. the heart disease was hard to deal with at that time

B. some doctors also could save Aunt Edith's life

C. Aunt Edith's children worried about their mother

D. Aunt Edith finally died when she was 57

2. The underlined word charge is the closest in meaning to ________.

A. problem

B. fee

C. time

D. chance

3. Aunt Edith didn't really expect an answer because ________.

A. she didn't know Dr. DeBakey's exact address

B. Dr. DeBakey was too busy to write a letter

C. she didn't tell the doctor her trouble

D. she thought the doctor didn't care about the poor

4. Dr. DeBakey promised to help Aunt Edith in order to ________.

A. make himself better-known

B. make her dream come true

C. honor his profession

D. help the children live better

5. Which is the best title of the passage?

A. A Lucky Widow

B. A Successful Operation

C. An Unexpected Answer

D. A Full-loved Letter

风机电机地脚固定螺栓松动可导致（）。

A、风量减小

B、电机过热

C、电机震动噪音加大

D、轴承损坏

某固体混合物由碳酸钾和硫酸钾组成，现取一定量的该固体于烧杯中，加入85g水，充分搅拌，使其完全溶解，然后向烧杯中加入200g一定溶质质量分数的氯化钡溶液，恰好完全反应，过滤后得到白色沉淀6.27g．经分析，该沉淀中有2.33g不溶于稀硝酸，其余全部能够溶解，且产生无色无味的气体．

（1）该固体中碳酸钾的质量为多少？

反应后，烧杯中所得溶液的溶质质量分数为多少？（计算结果精确到0.1%）

单位和个人有（）的义务。

A、开发水资源

B、利用水资源

C、节约用水

D、供应水