Edward and Robert Harmer were both born in the house onCranberry Lane. The map of their to

Which paragraph offers a possible solution for brain drain?

A．Paragraph 1.

B．Paragraph 2.

C．Paragraph 3.

D．Paragraph 4.

What can be viewed as a pull factor according to the author?

A．Population control.

B．Limited funds for research.

C．Better working conditions

D．Natural environment.

We learn from the passage that the push factors are related to______.

A．low employment

B．personal choice

C．tax revenue

D．home countries

Brain drain occurs when more and more talented people______.

A．move to developing countries

B．want to improve their creativity

C．move to developed countries

D．want to further their education

r country to work abroad, has become one of the developing countries concern. Brain drain is also referred to as human capital flight. More and more third world science-and-technology-educated people are heading for more prosperous countries seeking higher wages and better working conditions. This has of course serious consequences on the sending countries. While many people believe that immigration is a personal choice that must be understood and respected, others look at the phenomenon from a different perspective. What makes those educated people leave their countries should be seriously considered and a distinction between push and pull factors must be made. The push factors include low wages and lack of satisfactory working and living conditions. Social unrest, political conflicts and wars may also be determining causes. The pull factors, however, include academic freedom and extensive funds for research. Brain drain has negative impact on the sending countries economic prospects and competitiveness. It reduces the number of dynamic and creative people who can contribute to the development of their country. Likewise, with more entrepreneurs (企业家)taking their investments abroad, developing countries are missing an opportunity of wealth creation. This has also negative consequences on tax revenue and employment. Most of the measures taken so far have not had any success in softening the effects of brain drain. One option is to provide adequate working and living conditions in the sending countries. Another option should involve encouraging the expatriates (侨民)to contribute their skill to the development of their countries without necessarily moving back home.

Another term used for "brain drain" in this passage is "______".

A．human capital flight

B．talent loss

C．wealth relocation

D．intellectual immigration

Researchers at Womens Hospital in Boston will______.

A．make a follow-up study of the same 37 subjects

B．spend more money making flavanol drinks

C．take more time to test Small"s results

D．do similar experiments on a larger scale

The high-level flavanol drink used in the study is made from______.

A．coffee beans

B．cocoa beans

C．vegetables

D．tea

The new study published online focuses on the effects of cocoa flavanols on______.

A．weight

B．blood pressure

C．memory

D．heartbeat

Studies show that flavanols can do all the following EXCEPT______.

A．take off extra weight

B．lower bad cholesterol

C．help prevent heart disease

D．reverse memory failure

say "No". Can eating chocolate cake for breakfast, lunch and dinner be good for your heart? Again, they would say "No" , because that would be too good to be true. But new research shows that large amounts of flavanols(黄烷醇), substances found in cocoa(可可), tea and some vegetables, may reverse age-related memory failure. Another study is looking to see if high levels of cocoa flavanols can help prevent heart attacks and strokes. Flavanols found in dark chocolate are known to increase blood flow in the part of the brain that controls memory. They also help prevent heart disease by lowering blood pressure and " bad" cholesterol (腱固醇). A new study published online found that cocoa flavanols reverse minor memory loss in older adults. Dr. Scott Small, a professor at Columbia University, is the lead writer of a research paper describing the effects of cocoa flavanols on brain activity. The study involved 37 volunteers aged between 50 and 69. Researchers gave them a high-level flavanol drink made from cocoa beans or a low-level flavanol drink. For a period of three months, some subjects got 900mg of flavanol a day while the others got 10mg. Brain imaging and memory tests were given to each subject before and after the study. Dr. Small says that the subjects who had the high-level flavanol drink showed much improvement on memory tests. The researchers warn that more work is needed because this study was performed on a small group. Researchers at Womens Hospital in Boston recently announced plans to do just that.

The first paragraph indicates that

A．eating chocolate is good for one"s heart

B．people doubt the good effect of eating chocolate

C．eating chocolate may prevent memory loss

D．people should not eat too much chocolate