要组织一次篮球联赛，赛制为单循环形式（每两队之间都赛一场），

搜题请搜索小程序“爱下问搜题”

问题选择题

要组织一次篮球联赛，赛制为单循环形式（每两队之间都赛一场），计划安排21场比赛，则参赛球队的个数是（）

A．5个

B．6个

C．7个

D．8个

答案

答案：C

题目分析：设参赛球队的个数是x个，则每个队应比（x—1）场，根据题意列方程得：

，解得：=7；=—6（舍去）；故参赛球队的个数是7.

阅读理解

Read and choose. 阅读短文，选择正确的答案。

Hello! My name is Jack. I am a boy. I'm twelve years old. I like to go to school. Do you? I often go to

school at 7:30. When does the class begin? At 8:00 in the morning. I work hard at school. I do my math, I

read books and I write. At 12:00 I have lunch and at 4:30 I go home. Then I have supper with my family

at 6:30 in the evening. This is my day. How about you?

1. When is lunch?[ ]

A. At eight o'clock.

B. At twelve o'clock.

C. At eleven thirty.

2. Does Jack like to go to school?[ ]

A. Yes, he does.

B. No, he doesn't.

C. Yes, he is.

3. What does Jack do at school?[ ]

A. Do math.

B. Read and write.

C. Both A and B.

4. What time does Jack go home?[ ]

A. At four thirty.

B. At four.

C. At five thirty.

5. Whom does Jack have supper with?[ ]

A. His teacher.

B. His friend.

C. His father and mother.

多项选择题

机电工程注册建造师在填写施工管理签章文件时，应按照执业的工程类别，分别填写的施工管理签章文件有（）。

A.机电安装工程

B.石油化工工程

C.电力工程

D.冶炼工程

E.市政工程