清扫浓酸管道时，应用（）。

下列海域是欧洲西部的内海的是[ ]

A．波罗的海

B．北海

C．挪威海

D．比斯开湾

等腰△ABC的一边长为4，另外两边的长是关于x的方程x²-10x+m=0的两个实数根，则m的值是（　　）

A．24

B．25

C．26

D．24或25

阅读理解。

     In June, 2007, a group of students from eight high schools in Winnipeg, the capital of Canada's Manitoba

province, will begin test-launching (试发射) a satellite the size of a Rubik's cube.

     The one-kilogram Win-Cub satellite, named for its home city and its shape, will be put into low orbit. Once

in space, it can perform for a few months or up to several years, communicating information that could help

find the signs of earthquakes.

     There are 80 similar satellite projects worldwide, but this is the first high-school based program of its kind

in Canada. 30 Manitoba high school students are having a hand in designing and building the satellite, in

cooperation with aerospace (航空航天的) experts and 10 students from the University of Manitoba, and with

support from two other organizations.

     The Win-Cube project is not something that goes on a piece of paper; it is real-world engineering, allowing

high school students to have an opportunity to learn more about the exciting world of engineering through their

participation in this challenging program. It is also taken as a wonderful example of the unique partnerships

within Manitoba. Designing, building and launching a satellite with high-school participation will bring this world-

class educational project into reality and Manitoba closer to space.

     "These Manitoba high school students deserve congratulations for their enthusiasm, innovation (创新), and

a strong love for discovery," said Education, Citizenship and Youth Minister Peter Bjomson. "We want to make

science more relevant (相关的), interesting and attractive to high school students by showing them how

classroom studies can relate to practical experience in the workplace or, in this case, in space," Bjomson added.

     The Win-Cube program is mainly named at inspiring a strong desire for discovery on the part of the students.

It also shows Manitoba's devotion to research and innovation and the development of a skilled workforce-all

important drivers of knowledge-based economic growth.

1. According to the passage, the Win-Cube satellite is _____.

A. named after Manitoba and its shape

B. intended for international communication

C. designed like a Rubik's cube both in shape and size

D. challenged by university students around the world

2. According to Mr. Bjomson, _____.

A. those Manitoba high school students are worth praising

B. the study of space can be practically made in classrooms

C. Manitoba high schools are famous for the study of space

D. scientific research is too far away from high school students

3. The primary purpose of the project is to _____.

A. find the early signs of earthquakes

B. relate studies to practical

C. help high school students study real-world engineering

D. inspire a strong desire for discovery among the students

4. The best title for this passage may be _____.

A. Manitoba School

B. Win-Cube Program

C. Space Co-operation

D. Satellite Launching

综合性学习。

如今，越来越多的城里人利用双休日、节庆长假自驾车涌入周边乡村，住农家屋，吃农家饭，赏田园风光，品民俗文化，各地“农家乐”旅游异常火爆。一位朋友介绍。他这次“五一”长假在“农家乐”玩儿得很开心。我问他都玩儿了些啥，他介绍了几项：一是在树干上“荡秋千”，二是在林子里用弹弓打鸟，三是到小河里抓青蛙。还有一些人在“农家乐”摆阔炫富，乱丢垃圾，赌博酗酒等。可见，目前“农家乐”旅游尚待引导规范。

小题1:请你对不文明的游客说一句得体的话。

小题2:为保护环境，增进城乡文明交流，请你为“农家乐”接待方设计一条宣传标语。

小题3:请为你熟悉的村庄写一段推荐性的文字，以吸引游客前来度假。内容可以包括山水田园景色，或民风民俗，或饮食文化，或特色游玩安排等。(不超过20字)

为提供充分的物理访问补偿性控制，以下哪一项最不适用（）。

A.ID身份卡

B.口令

C.磁卡

D.访客登记