制作快速连接器时，一般要使单个连接器的连接损耗控制在（）dB以内。

注册安全工程师有( )义务。

A．遵守职业道德

B．维护本单位合法权益

C．在相应报告上签署意见

D．保守个人技术秘密

E．紧急情况下组织作业人员撤离

女性，36岁，双手近端指间关节痛2个月，有时肿，伴不规则低热。体检双手近端指间关节有压痛，肿大不明显，无畸形。血白细胞3．2×10⁹／L，尿蛋白30 mg／dl，血沉32 mm／第一小时末。本例最可能的诊断是（）

A.类风湿关节炎

B.风湿性关节炎

C.系统性红斑狼疮

D.急性白血病

E.反应性关节炎

读1995～1997年统计的世界和部分国家人口增长模式数据表，完成下列问题。

（1）计算A国人口自然增长率并填入表中。

（2）若表中三个国家分别是肯尼亚、德国、韩国，根据数据所示，B国是________。

（3）由表中数据可以看出，世界人口增长模式属于_____________。

（4）按人口增长模式转变的发展进程，将C国的名称填入上图相应括号中。

（5）从上图可以看出，人口增长模式转变的发展进程表现为：首先是_______率下降，其次________是率下降，最后导致_________率的下降。

（6）现代型人口增长模式的人口死亡率反而比转变前有所上升，其一般原因是_________________________________。

British scientists are breeding a new generation of rice plants that will be able to grow. in soil con­taining salt water. Their work may enable abandoned farms to become productive farms once more.

Tim Flowers and Tony Yeo, from Sussex University’s School of Biological Sciences,. have spent several years researching how crops, such as rice, could be made to grow in water that has become salty. The pairs have recently begun a three-year programme, funded by the Biotechnology and Bio­logical Sciences Research Council, to establish which genes enable some plants to survive salty condi­tions. The aim is to breed this capability into crops, starting with rice.

It is estimated that each year more than 10 million hectares (公顷) of agricultural land are lost because salt gets into the soil and stunts(防碍生长) plants. The problem is caused by several factors. In the tropics, mangroves that create swamps (沼泽) and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep (渗透) in. In Latin America, irrigation often causes problems when water is evaporated by the heat, leaving, salt deposits behind.

Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.

To overcome these problems. Flowers and Yeo decided to breed rice plants that take in very little salt and store what they do absorb in cells that do not affect the plants’ growth. They have started to breed these characteristics into a new rice crop, but it will take about eight harvests before the resul­ting seeds are ready to be considered for commercial use.

Once the characteristics for surviving salty soil are known, Flowers and Yeo will try to breed the appropriate genes into all manners of crops and plants. Land that has been abandoned to nature will then be able to bloom again, providing much needed food for the poorer countries of the world.

4. Which of the following statements about Flowers and Yeo is true?

A. They are students at Sussex University.  B. They are rice breeders.

5. Which of the following is NOT mentioned as a cause of the problem discussed in the passage?

A. Natural barriers to sea water have been destroyed.

B. The water table has gone down after droughts.

C. Sea level has been continuously rising.

D. Evaporation of water leaves salt behind.

6. The word "affect" in Paragraph 5 could be best replaced by________.

A. influence               B. effect               C. stop                    D. present

7. The attitude of the author towards the research project is________.

A. positive                B. negative            C. suspicious             D. indifferent

第二次世界大战后资本进一步国际化的突出特点是

A．商业资本的国际化

B．借贷资本的国际化

C．产业资本的国际化

D．货币资本的国际化