更多"Scientists have found a way of prot"的相关试题:
[填空题]Scientists have found a way of protecting astronauts from solar radiation.
[单项选择]
Hair Detectives
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
[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
[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.
[填空题]Many people believed that Dr Freud found a way to ______.
[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] Through my mom’’s loving words, I found a way back.
When you wake up in jail—especially having been raised by God-fearing, hard-working, honest people like my mama and daddy—you know what alone means. You’’ve betrayed who you are, the values you believe in, and the people who gave you everything. At that moment, being a country singer wasn’’t what mattered. All I could think about was what I was going to tell the Pentecostal (圣灵降临节派的) preacher’’s daughter who brought me up.
I woke up on March 15, 2001, on a tiny cot in a jail cell in Nashville, wondering how it all came to this. At 37, I was looking at a sentence of 15 years for felony theft, and by all rights, I should have served it. I was addicted to crystal rnethamphetamine (冰毒), and I’’d been stealing my friends’’ musical instruments and pawning (典当) them to get money to feed my habit. I’’d been caught red-handed (当场) with $ 25,000 worth of pilfered (偷窃的) equipment stacked up in my living room. And I was high as a Ge
A. The author was sent to jail because he betrayed the value he believed in.
B. The author resorted to stealing so as to satisfy his drug addict.
C. The author might have experienced a tough childhood.
D. The author was abandoned by his birth parents shortly after he was born.
