Ph1染色体主要出现在哪种白血病()A．急性淋巴细胞性白血病 B．慢性淋巴细胞性白血

下列有关金属的腐蚀与防护的说法中，不正确的是

A．温度越高，金属腐蚀速率越快

B．在铁管外壁上镀锌可防止其被腐蚀

C．金属被腐蚀的本质是金属发生了氧化反应

D．将钢闸门与直流电源的正极相连可防止其被腐蚀

设某数据库中有作者表(作者号，城市)和出版商表(出版商号，城市)，请补全如下查询语句，使该查询语句能查询作者和出版商所在的全部不重复的城市。

SELECT城市FROM作者表

（）

SELECT城市FROM出版商表

精神性出汗

阅读理解。

     Reading is very important to help you learn English. To learn as much as you can from reading, you

need to read different kinds of English. This book provides not only different kinds of English but also a

good way to check your reading ability.

     There are four parts in the book:

     Part 1 is Messages: In this part somebody wants to send information in writing to somebody else. There

is a test on timetable and a test on text messages.

     Part 2 is People: In this part all the tests are about people. For example, there is an informal letter between

friends. There is formal (正式的) English in biography (传记). There is a job application as a model to help

with your writing, as well as testing your reading.

     Part 3 is Places: In this part, too, many different kinds of English are shown, some informal and some

formal. There is the informal English of a holiday postcard. There is also the formal English in a letter of

complaint.

     Part 4 is Things: You will find some descriptive writing in this part. There are descriptions of clothes

and of a computer.

     You can do these tests in any order you like, or you can do all the tests with a formal or informal text.

I enjoyed writing this book and I hope you enjoy using it.

1. We can find the introduction to a product in _______.

A. part 1

B. Part 2

C. Part 3

D. Part 4

2. Which of the following is most probably written in informal English?

A. A letter of complaint.

B. A computer handbook.

C. A letter of a friend.

D. A story of a president.

3. The passage is most probably written for _______.

A. test designers

B. students

C. test-takers

D. teachers

4. What is the best title of the book?

A. Test Your Reading

B. Help with Your Writing

C. Learn Different Kinds of English

D. Practise English in Different Ways

维抢修工具设备物品应严格执行《出、入库管理制度》，做到出、入库有（），谁丢失谁赔偿。

A、检查

B、控制

C、登记

D、审批