What can we learn about the design of the "Case Study House"?A．Mechanical devices were widely used.B．Natural scenes were taken into consideration.C．Details were sacrificed for the overall effect.D．Eco-friendly materials were employed.

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I′ve often wondered how exactly sleep, or lack of it, can have such an awful effect on our bodies and, guess what, how much we sleep switches good genes on and bad genes off.
In the first half of 2013, the Sleep Research Centre at the University of Surrey found a direct link between hours spent sleeping and genes. Every cell in our bodies carries genetic instructions in our DNA that act as a kind of operating handbook. However, each cell only "reads" the part of this handbook it needs at any given moment.
Can sleep affect how a gene reads instructions It′s a question asked by Professor Derk-Jan Dijk at the University of Surrey. He set up an experiment and asked his volunteers to spend a week sleeping around seven and a half hours to eight hours a night and the next sleeping six and a half to seven hours.
Blood samples were taken each week to compare which genes in blood cells were being used during the long and short nights. The results were rather surprising. Several hundred genes changed in the amount they were being used, including some that are linked to heart disease, cancer, and Type 2 diabetes. Genes to do with cell repair and replacement were used much less.
Sleep restriction (six and a half to seven hours a night) changed 380 genes. Of these,220 genes were down regulated (their power was reduced), while 160 were up regulated (their power was increased). Those affected included body-clock genes which are linked to diabetes. One of the most downgraded genes is that which has a role in controlling insulin and is linked to diabetes and insomnia. The most upgraded gene is linked to heart disease.
So changing sleep by tiny amounts can upgrade or downgrade genes that can influence our health and the diseases we suffer from when we sleep too little.
The important message is that getting close to eight hours of sleep a night can make a dramatic difference to our health in just a few days through the way it looks after our genes.

What can we learn about Professor Derk-Jan Dijk′ s experiment 查看材料

A.The experiment was carried out to find the answer to how genes affect sleep.
B.The experiment took a period of more than two weeks to reach a conclusion.
C.His volunteers were divided into two groups with two different sleeping patterns.
D.Blood samples of the volunteers were checked afterwards to decide how many genes changed in sleeping.

Her speech was ______,that is to say, we ______ her speech.

A.impressive;were impressing by
B.impressed;were impressed at
C.impressive;were impressed with
D.impressing;were impressing at

Text 3 We tend to think of the decades immediately following World War II as a time of prosperity and growth,with soldiers returning home by the millions,going off to college on the G.I.Bill and lining up at the marriage bureaus.But when it came to their houses,it was a time of common sense and a belief that less could truly be more.During the Depression and the war,Americans had learned to live with less,and that restraint,in combination with the postwar confidence in the future,made small,efficient housing positively stylish.Economic condition was only a stimulus for the trend toward efficient living.The phrase“less is more”was actually first popularized by a German,the architect Ludwig Mies van der Rohe,who like other people associated with the Bauhaus,a school of design,emigrated to the United States before World War II and took up posts at American architecture schools.These designers came to exert enormous influence on the course of American architecture,but none more so than Mies.Mies's signature phrase means that less decoration,properly organized,has more impact than a lot.Elegance,he believed,did not derive from abundance.Like other modern architects,he employed metal,glass and laminated woodmaterials that we take for granted today but that in the 1940s symbolized the future.Mies's sophisticated presentation masked the fact that the spaces he designed were small and efficient,rather than big and often empty.The apartments in the elegant towers Mies built on Chicago's Lake Shore Drive,for example,were smaller—twobedroom units under 1，000 square feet—than those in their older neighbors along the city's Gold Coast.But they were popular because of their airy glass walls,the views they afforded and the elegance of the buildings'details and proportions,the architectural equivalent of the abstract art so popular at the time.The trend toward“less”was not entirely foreign.In the 1930s Frank Lloyd Wright started building more modest and efficient houses—usually around 1，200 square feet—than the spreading twostory ones he had designed in the 1890s and the early 20th century.The“Case Study Houses”commissioned from talented modern architects by California Arts&Architecture magazine between 1945 and 1962 were yet another homegrown influence on the“less is more”trend.Aesthetic effect came from the landscape,new materials and forthright detailing.In his Case Study House,Ralph Rapson may have mispredicted just how the mechanical revolution would impact everyday life—few American families acquired helicopters,though most eventually got clothes dryers—but his belief that selfsufficiency was both desirable and inevitable was widely shared.
What can we learn about the design of the“Case Study House”?

A.Mechanical devices were widely used.
B.Natural scenes were taken into consideration.
C.Details were sacrificed for the overall effect.
D.Ecofriendly materials were employed.