【题目】听下面一段较长对话，回答以下小题。
【1】What does the man care about most?
A.Spending less money.B.Being comfortable.C.Using the least time.
【2】Which of the following is true according to the dialogue
A.The man needs to change trains.
B.The man doesn’t need to change trains.
C.The man needs to walk all the way to Grove Street.
【答案】
【1】A
【2】A
【解析】
【原文】
M: Excuse me. Where is the airport?
W: Um…it’s pretty far away. I can show you on the map on my smart phone.
M: Oh, sorry…what I meant is how can I get there?
W: Well, that depends. Do you want to get there quickly or cheaply?
M: Probably the latter would be better.
W: All right. If you go down one block and take a left, you’ll see the No.12 subway station. Take the No.12 all the way to Grove Street, and then transfer to the airport express train.
M: How will I know where to change trains?
W: There will be announcements on the train. But I’m sure there will also be a lot of other people with big suitcases. You can just follow them!
快乐小博士巩固与提高系列答案科目：高中英语 来源： 题型：
【题目】 A breathtaking trick potentially left over from our ancestors might be found in us — the ability to sense oxygen through our skin.
Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo.
Now the same oxygen sensors found in frog skins and in the lungs of mammals (哺乳动物) have unexpectedly been discovered in the skin of mice.
“No one had ever looked,” explained Randall Johnson, a biologist researcher.
Mice and frogs are quite distant relatives, so the fact they have these molecules (分子) in common in their skin suggests they might well be found in the skin of other mammals, such as humans.
“We have no reason to think that they are not in the skin of people too,” Johnson said.
These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen—a dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone (荷尔蒙) even after hours of such low oxygen.
These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia (贫血症) without injecting drugs, which make up a multibillion-dollar market, Johnson said.
Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. “It’s hard to say what exactly might be done, however—there’s a lot we don’t know yet,” Johnson explained.
The scientists detailed their findings in the April 18 issue of the journal Cell.
【1】Which of the following statements is TRUE according to the passage?
A.Johnson believes that Oxygen sensors also exist in human skin.
B.People have to surf the Internet to read detailed findings.
C.It has been proved that these findings help treat lung diseases.
D.It has long been expected oxygen sensors exist in mice’s skin.
【2】One of the functions of the molecules mentioned above is _______.
A.carrying oxygen around the bodyB.improving athletes’ performance
C.detecting oxygenD.increasing level of oxygen
【3】What is Johnson’s attitude to the application of the findings to the athletes’ training?
A.NegativeB.Doubting
C.PositiveD.Hesitating
【4】The best title of the passage may be _______.
A.Great Findings Benefits Athletes A Lot
B.Frogs And Mice Are Distant Relatives
C.First Known Animal Breathes Through Skin
D.Humans Might Sense Oxygen Through Skin
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Researchers with the United States Geological Survey (美国地质勘探局) are working late into the night. They are searching for and catching frogs in the mountains of the Sierra Nevada. The Pacific chorus frog (拟蝗蛙) breeds in the high mountains just as the snow melts. The pools basically fill with meltwater, and as soon as the ponds melt the chorus frogs begin breeding there. Some Pacific chorus frogs in the mountains of California have tested positive for farming pesticides.
Gary Fellers is a researcher who once worked for the USGS. He and other team members are collecting the frogs to test them for agricultural poisons. No one farms in these forested national parks. However, winds carry chemicals from the Central Valley farming area into the mountains.
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【1】Animals in Northern California’s national parks ________.
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Paragraph 1:
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________________________________________________________________________________________________________________________________________________________________________________________________________
Paragraph 2:
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