X线摄影中，对体位的描述均以解剖学姿势为准。关于解剖学方位，以下错误的是（） A.仰

下列说法正确的一组是（  ）

①不溶于水的盐（CaCO₃、BaSO₄等）都是弱电解质

②盐都是强电解质

③0.5 mol·L^-1的所有一元酸中氢离子浓度都是0.5 mol·L^-1

④强酸溶液中氢离子浓度一定大于弱酸溶液中氢离子浓度

⑤电解质溶液导电的原因是溶液中有自由移动的阴、阳离子

⑥熔融的电解质都能导电

A．①③⑤⑥

B．②④⑤⑥

C．只有⑤

D．只有⑥

阅读理解

      LOS ANGELES---BYD is a rapidly developing car-maker in China. It makes green cars and other

green products, and the company said on Friday it would open a North American branch in Los Angeles, with plans to begin selling cars in the U.S. by the end of 2010.

     BYD was started in 1995 and moved into the car business in 2003. The company now employs

150,000 people.

     Arnold Schwarzenegger, the governor of California, says the arrival of BYD Inc, of Shenzhen, China, will create about 150 high-paying jobs, since the company has to employ managers and engineers. Once

it begins to sell cars in the United States, several hundred more jobs will be created in service and sales.

He also praised it as part of green-energy programs in U.S. The city is attracting high-tech, clean-energy

companies that will help reduce pollution. “As I’ve always said, what is good for the environment is also

good for development,” he adds.

     Wang Chuanfu, BYD’s president, says, “BYD stands for building your dream. Our dream is a green

one, and we also wish to make your green dream come true. We have been working for a greener

environment. We hope that we will lead to a cleaner and nicer future.” The company introduced its latest

model earlier this year. It is what BYD plans to begin to sell in the United States by the end of this year.

1. BYD’s new branch in the United States will _________.

A. employ managers and engineers from China  

B. produce a new model to sell there

C. sell car technology to the U.S.  

D. create many new jobs for the U.S.

2. From the passage we learn that ________.

A. only service and sales jobs will be offered.

B. BYD will only make cars in China

C. the governor welcomes BYD’s arrival

D. BYD will have finished planning by the end of 2010

3. The “green dream” in the passage means _______.

A. a new world with more green trees

B. a dream of high technology

C. a world with a better environment

D. a dream of fewer cars

4. The best title for the passage would be _________.

A. The Green Dream of BYD    

B. BYD Joins Green Energy Programs

C. New BYD Car Exhibition in Los Angeles  

D. Green BYD Putting Roots in Los Angeles

5. Where can you most probably read this passage?

A. a novel  

B. a research paper    

C. a student’s composition  

D. a newspaper report

开剥光缆时，光缆开剥长度范围根据接头盒类型不同，开剥长度控制在（）之间。

千分尺是利用接长杆将角度位移变为直线位移的。