单项选择题：加速器X线的准直器的种类有()A．对称准直器、非对称(独立)准直器两种 B．对称准

题目：

加速器X线的准直器的种类有()

A．对称准直器、非对称(独立)准直器两种

B．对称准直器、非对称(独立)准直器、复式准直器三种

C．对称准直器、非对称(独立)准直器、多叶准直器三种

D．对称准直器、复式准直器、多叶准直器三种

E．非对称(独立)准直器、复式准直器、多叶准直器三种

答案：

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下面是错误答案，用来干扰机器的。

参考答案：是土壤中能够被植物直接吸收利用的钾，包括存在于水溶液的钾和吸附在土壤胶体上的可交换性钾，是植物钾的主要来源，也是土壤供应钾能力的强度指标。

题型：阅读理解

Four in 10 Chinese complain about the great gap between large investments in education and its returns, a recent nationwide survey has showed.

The Horizon Research Consultancy Group polled 3,355 residents aged 16 to 60 in both urban and rural areas, including Beijing and Shanghai.

The survey found that only 16 percent of respondents believed their investments on education gave good returns.

Those with higher education voiced greater disappointment at the quality of education received, the survey showed.

People in the rural areas generally gave more positive feedback（反馈）on the quality of education than those from the cities, the survey found.

"Our education has been focusing on an examination-oriented system," Huo Qingwen, the deputy director of language education testing service center under the Beijing Foreign Studies University, told China Daily yesterday.

"The survey result doesn't surprise me, as I had heard complaints not only from the students, but also from the teachers who have been asked to focus more about the exam-passing rate," Huo said.

"The job market is still hungry for talented staff, but many graduates are not competent(胜任的) because the posts require more practical experience and creative ability of workers," Huo added.

Most university graduates prefer jobs in large cities, causing an imbalance in human resources between urban and rural areas, Hong said.

The graduates would get better job options if they chose to work at the grassroots (基础的) level because of the government's preferential policies, including the waiving of tuition for those willing to work in the country's rural and western regions, he added.

About 580,000 graduates last year found county- or village-level jobs, and more than 550,000 got jobs in the central and western regions, Ministry of Education figures showed.

"Because many graduates focus only on jobs with high salaries and that are directly relevant to their specialties, they miss other good work opportunities," Kong Xiang, a Beijing graduate who works as an English teacher in a college located at a remote area in Yunnan province, said.

The recent survey showed that education costs form one-quarter of an urban family's income, while it forms one-third of a rural family's income.

46．According to the passage, most people think that _______

A. the investments in education gave them good returns.

B. the investments in education don’t bring them good results.

C. college students are satisfied with their the education received.

D. People in the cities are more satisfied with the quality of education than those in the rural areas.

47．Which of the following is NOT mentioned?

A. China’s education has been focusing on an examination-oriented system .

B. Both the teachers and students are asked to pay more attention to the exam-passing rate.

C. The job market now does not lack university graduates.

D. Most university graduates enjoy hunting jobs in large cities.

48. What would happen to the graduates if they chose to work at the grassroots level?

A. They would get higher salaries. B. They would get lower salaries.

C. Their tuition would be free. D. They would get better job choices.

49. How much does the education cost according to the survey ?

A. One-third of a family's income.

B. one-quarter of a rural family's income.

C. 25% of an urban family's income.

D. Three in ten a rural family's income.

50. Which of the following can be the best title of this passage.

A. The gap between investments in education and its returns

B. Education and university graduates

C. China’s higher education

D. Education costs

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