When mouth pH goes below 5.5, what is dissolved?
第1题
Do you know what lungs (肺) are like? (11) are in the upper part of our bodies. We have two of them. There are thousands of little pipes (管子) going through them. The (12) are like the branches of a tree and they go through every part of each lung. When we breathe in, air goes through the nose and mouth and travels down a large pipe. The other end of this pipe becomes two smaller pipes and each goes into one lung. (13) passes through those pipes and is carried around the body.
When you (14) , your upper body moves in and out. To breathe in, air rushes into your lungs. To breathe out, air is forced out of your lungs. The air we breathe goes into every part of the lungs through the branching pipes. They take it to the (15) which is moving all the time through the lungs and round to every part of our bodies. The blood goes around our body and back to the lungs in a very short time.
第2题
126.A.from B.into C.in D.on
127.A.correct B.free C.freely D.right
128.A.at a table B.on the table C.at the table D.on a table
129.A.upon B.into C.to D.onto
130.A.Japanese B.French C.Chinese D.English
第3题
A foreigner once got hungry and went into a restaurant in London. He sat down at a table.
When the waiter came, he opened his mouth, put his fingers____2__it and took them out again in order to express that he wanted something to eat for he could not speak English.
The waiter soon brought a cup of tea. The man shook his head. The waiter then took away the tea and brought a cup of coffee. The man again shook his head. The man tried again and again, but he wasn't able to make___3___understood. Finally another man came in. He spoke English clearly and fluently. In a few minutes, there was a large plate of meat and vegetables on the table___4__him.
So you see a man often goes hungry if he doesn't__5_a foreign language.
(1)
A:into
B:freely
C:before
D:himself
E:master
(2)
A:into
B:freely
C:before
D:himself
E:master
(3)
A:into
B:freely
C:before
D:himself
E:master
(4)
A:into
B:freely
C:before
D:himself
E:master
(5)
A:into
B:freely
C:before
D:himself
E:master
第4题
A foreigner once got hungry and went into a restaurant in London. He sat down at a table.
When the waiter came, he opened his mouth, put his fingers 2 it and took them out again in order to express that he wanted something to eat for he could not speak English.
The waiter soon brought a cup of tea. The man shook his head. The waiter then took away the tea and brought a cup of coffee. The man again shook his head. The man tried again and again, but he wasn't able to make 3 understood. Finally another man came in. He spoke English clearly and fluently. In a few minutes, there was a large plate of meat and vegetables on the table 4 him.
So you see a man often goes hungry if he doesn't 5 a foreign language.
(1)、
A:into
B:freely
C:before
D:himself
E:master
(2)、
A:into
B:freely
C:before
D:himself
E:master
(3)、
A:into
B:freely
C:before
D:himself
E:master
(4)、
A:into
B:freely
C:before
D:himself
E:master
(5)、
A:into
B:freely
C:before
D:himself
E:master
第5题
The Virus Hunters
The mouth of the Amazon River has long been a starting place for hunters going to the jungles of Brazil. In recent years it has been, too, the headquarters for a middle-aged American couple who hunt the smallest living things and perhaps the most deadly viruses. Dr Causey and his wife have discovered more new types and more old ones in new places than all of the other search teams.
Dr. Causey insists that the couple's success is due more to the number of viruses in the forests of the Amazon than to the skill he and his wife have developed during their eighteen years of work in Brazil.
"We have found the loveliest diseases fight in our backyard," he told me one day as we walked through a light rain along a jungle trail.
"Oh, these viruses are here all fight. There is in the jungle a great pool of disease which is carried in the blood of animals and birds. Some of the diseases can be caught by people. It may be that we shall find that the jungle is a great center of virus disease and that it overflows from here to other parts of the world. It may be that birds carry the viruses to far countries. It may be that some viruses which presently reproduce in man without making him ill, may change and become deadly to him. 'Viruses waiting for a disease,' they are sometimes called. This is just an idea, you understand. We do not know, but it is important that we find out, and the first step in finding out is to learn what viruses there are in the jungles." There is a Brazilian story about the beginning of the world which goes: "When God was making the world he tried to keep everything in balance. When he made a desert, he provided it with some green places. When he made a land that was beautiful, he gave it storms and other terrible things caused by the weather, where the earth was rich below the surface, it was also made hard to live on, where the land could be farmed, the weather was made too hot or too cold or too dry. Where there was enough water, God made it so that there should sometimes be too much water.
"But in one place God made a land that was rich, where everything grew easily, where it was not too hot and certainly not too cold, where animals were plentiful and fruit hung from the trees all the year round."
"The angels looked at this loveliness and were jealous of man. They asked God if this was not too beautiful, too much like heaven, this valley of the Amazon." And God said, "True, this land looks like heaven, but wait until you see what happens to man when he tries to live in it."
When Dr. Causey said, "We have found the loveliest diseases right in our backyard," he meant ______.
A.new viruses have just been discovered
B.his discovery was a bit frightening
C.he and his wife were surrounded by harmful viruses
D.his job was exciting
第6题
Unfortunately, many salespeople are【C8】______to tell the truth. They【C9】______some in formation, or share partial truths, or just plain lie. They do it in the【C10】______that customers will buy when they hear【C11】______they want to hear. It is true that customers want to hear certain things but【C12】______they are true. Let's go back to the restaurant.【C13】______the wait is not 15minutes-it is 90 minutes. It is not what we want to hear. Still, we can decide to stay or not to stay. If we do not stay, we will be hack. But if we【C14】______told 30 minutes and it became 90, that【C15】______the last time we ate there. Sooner or later, customers al ways find out the truth. If the truth is different than what they have been told, you have lost their trust.
Truth is【C16】______accuracy. It includes a willingness to stand behind what you say. In other words, are you willing to put your money【C17】______your mouth is? If you are working with others, part of their【C18】______is that when something goes wrong you will stand with them. If an order is delayed, for example, how will you help them【C19】______their business commitments? Part of earning their trust is having a backup plan in place should your【C20】______systems fail.
【C1】
A.takes
B.spends
C.lasts
D.relies
第7题
M: I think they don't speak because their culture values modesty, and they don't want to appear to be showing off. Goes back to Confucius.
Q: Why don't Chinese students say anything in class according to the man?
(14)
A.They are too shy.
B.They are not allowed to speak.
C.They are modest.
D.They don't dare to speak.
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