[单项选择]

Recorded background music first found its way into factories, shops and restaurants in the States. But it soon spread to other parts of the world. Now it is becoming increasingly difficult to go shopping or eat a meal without listening to music.
The best-known supplier of background music is an American company called "Muzak". This word also refers to recorded background music played continuously in restaurants, places of work, etc. The company has carded over a hundred studies which show that background music can create a pleasant atmosphere and improve productivity (生产效率). It must be used in the right way, though. If the type of "Muzak" is wrong, it may well cause an entire factory to sleep!

Which of the following statements is true（）
A. Background music is only used in the States.
B. Background music is used all over the world except the States.
C. Most shops and restaurants use background music now.
D. It is very difficult to listen to background music.

[单项选择]

Recorded background music first found its way into factories, shops and restaurants in the States. But it soon spread to other parts of the world. Now it is becoming increasingly difficult to go shopping or eat a meal without listening to music.
The best-known supplier of background music is an American company called "Muzak". This word also refers to recorded background music played continuously in restaurants, places of work, etc. The company has carded over a hundred studies which show that background music can create a pleasant atmosphere and improve productivity (生产效率). It must be used in the right way, though. If the type of "Muzak" is wrong, it may well cause an entire factory to sleep!

It has been proved that "Muzak" can（）
A. improve productivity
B. create a pleasant atmosphere
C. cause an entire factory to sleep
D. all of the above

[填空题]Scientists have found a way of protecting astronauts from solar radiation.

[单项选择]
Scientists have found a way to use hair to figure out where a person is from and where that person has been. The finding could help solve crimes, among other useful applications.
Water is central to the new technique. Our bodies break water down into its parts: hydrogen and oxygen. Atoms of these two elements end up in our tissues and hair.
But not all water is the same. Hydrogen and oxygen atoms can vary in how much they weigh. Different forms of a single element are called isotopes. And depending on where you live, tap water contains unique proportions of the heavier and lighter isotopes of hydrogen and oxygen.
Might hair record these watery quirks That’s what James R. Ehleringer, an environmental scientist at the University of Utah in Salt Lake City, wondered to find out he and his colleagues collected hair from barbers and hair stylists in 65 cities in 18 states across the United States. The researchers
A. Tap water reflects the concentrations of hydrogen and oxygen isotopes in different regions.
B. Tap water is a kind of soft drink in the United States.
C. Tap water contains unique proportions of isotopes of hydrogen and oxygen.
D. Tap water is used to cook foo

[填空题]Many people believed that Dr Freud found a way to ______.

[单项选择]Scientists say they have found a way to produce the human body's own cancer-killing cells through gene treatment, ______ new hope to cancer sufferers.
A. offering
B. showing
C. taking
D. making

[单项选择]According to the speech, who found the way to weigh atoms
A. Democritus.
B. CarlH. Snyder.
C. Amadeo Avogadro.
D. John Dalton.

[单项选择]I could still have found my way into science in a nonexpansionist civilization of the future, where upward social mobility and its ______ opportunities would no longer be taken for granted to the degree that they have been in recent centuries.
A. attending
B. attendant
C. pendant
D. pending

[填空题]When did the university first start its recruitment In ______

[填空题]When did Indian tea begin to find its way into London market