核右移是指外周血中出现5叶核以上的中性粒细胞超过（） A.2% B.3% C.4%

阅读理解。

    English is spoken as a first language by most people in the USA, Britain, Australia, New Zealand,

Ireland and Canada. However, English is spoken all over the world. It is the main language in over 60

countries, including India, Singapore and many of the Caribbean and Pacific islands. In these places

English is spokenas a second language.

    English is also an international language in many other countries, like China and Japan. People in

these countries use it for business, and travelers to these countries use English when they get there to

communicate. Other people may learn English because they enjoy reading books in English, listening to

British or American music or watching American films.

    English has changed a lot over the years and still goes on changing. It is no longer right to talk about

British English or American English if the speakers come or don't come from those countries. People in

Japan and Korea, for example, may use the American spelling but may not sound like Americans.

    English will probably be the most widely used language in the world by the end of the 21st century.

This language no longer belongs to British, American or Australian speakers. It be-longs to anyone in the

world. So, as a middle school student of English today, think about how you can use this language. After

you leave school, you will almost certainly need it.

1. In how many countries is English spoken as a first language? [ ]

A. Five.

B. Four.

C. Three.

D. Six.

2. In which other countries is English spoken as a main language? [ ]

A. Britain, the USA, Australia.

B. India, Singapore and many of the Caribbean and Pacific islands.

C. China, Japan.

D. Over 60 countries.

3. People from other countries learn English for ______. [ ]

A. passing exams

B. business and traveling

C. reading English books, enjoying English music or films

D. both B and C

4. Even if people in Japan and Korea use American spelling they            . [ ]

A. will speak the same as Americans

B. may not sound like Americans

C. will speak British English

D. will speak English much better

5. Which answer best describes the passage? [ ]

A. A First Language in the World

B. A Second Language in the World

C. English Around the World

D. A useful language

单向阀在真空发生泵和污物箱之间装有一个单向阀，允许空气从污物箱和污物管中排出，当空气阀关闭时，防止（）。

A.空气反流

B.空气逆流

C.空气流通

D.空气堵塞

当品类发展到某种程度，新消费者的增加缓慢甚至（），品牌增加也逐渐稳定，品类即进入（）。

(11)～(13)题使用下图，表单名为Form1，表单中有两个命令按钮(Command1和 Command2)、两个标签、两个文本框(Text1和Text2)。

假设用户名和口令存储在自由表“口令表”中，当用户输入用户名和口令并单击“登录”按钮时，若用户名输入错误，则提示“用户名错误”：若用户名输入正确，而口令输入错误，则提示“口令错误”。若命令按钮“登录”的Click事件中的代码如下：
USE 口令表
GO TOP
flag=0
DO WHILE.not. EOF()
IF Alltrim(用户名)==Alltrim(Thisform. Text1. Value)
IF Alltrim(口令)==Alltrim(Thisform. Text2. Value)
WAIT“欢迎使用” WINDOW TIMEOUT2
ELSE
WAIT“口令错误” WINDOW TIMEOUT2
ENDIF
flag=1
EXIT
ENDIF
SKIP
ENDDO
IF ______________
WAIT“用户名错误” WINDOW TIMEOUT2
END IF
则在横线处应填写的代码是( )。

A．flag=1

B．flag=0

C．flag=1

D．flag=2