题目内容
【H15】
查看答案
搜索结果不匹配？点我反馈
更多问题
Nurses
The physicians in a hospital form. the core of the medical staff. But they could not provide effective medical care to their patients without the help of numerous other medical workers. From the angle of the patients, the nursing staff is particularly important. Nurses are usually in close contact with patients as long as they are in the hospital.
A nurse does not study for as many years as a doctor. However, each must be equally trained, Caring for sick persons requires a great deal of patience and concern. Most nurses work long days, and they often must work at odd hours or during the night.
The nursing staff in a hospital is usually quite large and various. Nursing services, after all, must be provided on a 24-hour basis. There are professional (专业的) nurses, practical nurses, nurse's aids, and orderlies (勤杂工). The general term nurse refers to a person trained to offer bedside care to sick persons.
Under the supervision (管理) of the head nurse, the nursing staff in a hospital ward must attend to patients' needs. This responsibility continues around the clock, and so nurses must work in shifts. A shift is a period of duty, usually eight hours in length. The nurses on the ward rotate (轮换) their shifts. Some take turns working night duty; others work odd shifts. All of them work out of a central area on the ward called the nurse's station.
A nurse must always be on her guard. She can never afford to be careless. This is true in all nursing situations, but it is especially true in the intensive care unit. Patients under intensive care are critically iii, and they must be monitored at all times. The nurses who do intensive care duty have one of the most demanding jobs in the hospital.
The physicians in a hospital are less important than the nursing staff.
【H5】
【H14】
Egypt Felled by Famine
Even ancient Egypts mighty pyramid builders were powerless in the face of the famine that helped bring down their civilian around 2180 BC.Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blem and the same or worse could happen today.
The ancient Egyptians depended on the Nile's annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have diminished these floods.
Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablise the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment from the White Nile.
The Blue Nile mud has a different isotope signature from that of the White Nile. So by analyzing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river.
Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4,500 to 4,200 years ago, immediately predates the fall of the Egypt's Old Kingdom.
The weakened waters would have been Catastrophic for the Egyptians. "Changes that affect food supply don't have to be very large to have a ripple effect in societies", says Bill Ryan of the Lamont Doherty Earth Observatory in New York.
Similar events today could be even more devastating, says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington,D.C:" Anything humans do to shift the climate belts would have an even worse effect along the Nile system because the populations have increased dramatically
Why does the author mention "pyramid builders"？
微信支付 
支付宝支付