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The Company switches have all been upgraded to use VTP version 2. What are two benefits provided in VTP Version 2 that are not available in VTP Version 1？（）
A . VTP version 2 supports Token Ring VLANs
B . VTP version 2 allows VLAN consistency checks
C . VTP version 2 allows active redundant links when used with spanning tree
D . VTP version 2 reduces the amount of configuration necessary
E . VTP version 2 saves VLAN configuration memory
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Of all the students in our class, Betty writes（）
A . very carefully
B . most carefully
C . more carefully
D . the most carefully
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A vessel operating in class has met all the requirements of the （）.
A . CCS or similar society
B . insurance company
C . MSA
D . the Custom
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If we ask the class to listen and we ask the questions afterwards, we are helping them improve their listening skill indeed.（）
A . 正确
B . 错误
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In an English class we are usually concerned with casual listening.（）
A . 正确
B . 错误
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Most of us are aware that we are moving all the time.
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Are we all alone by ourselves in the Universe?
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We are in the same class. We are __________.
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Culture is constantly developing( ) and changing. Who we are, what we believe, what we want out of life, our view of justice, fairness, appropriateness are all the result of the culture we live in.
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We are all connected in the great circle of life. 意思是：在这个生命圈里面都是互相有关联的。（ ）
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It is because English is very useful in all the fields________ we are studying it hard.
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We are all_______ to dislike those who are critical of us.
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We are all for your proposal that discussion ( ).
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Questions 31 to 35 are based on the following passage. We all have offensive breath at one time or another. In most cases, offensive breath emanates from bacteria in the mouth, although there are other more causes.
Until a few years ago, the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition.
Bad breath can happen whenever the normal flow of saliva (唾液) slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit evil smelling gases, the worst of which is hydrogen sulfide (硫 化物).
Mouth bacteria thrive in airless conditions. Oxygen rich saliva keeps their numbers down. When we sleep, for example, the saliva stream slows, and sulfur producing bacteria gain the upper hand, producing classic “morning breath”.
Alcohol hunger, too much talking, breathing through the mouth during exercise anything that dries the mouth produces bad breath. So can stress, though it’s not understood why. Some people’s breath turns sour every time they go on a job interview.
Saliva flow gradually slows with age, which explains why the elderly have more bad breath trouble than younger people do. Babies, however, who make plenty of saliva and whose mouths contain relatively few bacteria have characteristically sweet breath.
For most of us, the simple, dry mouth variety of bad breath is easily cured. Eating or drinking starts saliva and sweeps away many of the bacteria. Breakfast often stops morning breath.
Those with chronic dry mouth find that it helps to keep gum, hard candy, or a bottle of water or juice around. Brushing the teeth wipes out dry mouth bad breath because it clears away many of the offending bacteria.
Surprisingly, one thing that rarely works is mouthwash. The liquid can mask bad breath odor with its own smell, but the effect lasts no more than an hour. Some mouthwashes claim to kill the bacteria responsible for bad breath. The trouble is, they don’t necessarily reach all offending germs. Most bacteria are well protected from mouthwash under thick layers of mucus (粘液). If the mouthwash contains alcohol-as most do-it can intensify the problem by drying out the mouth.
第31题：The phrase “emanate from” in Paragraph 1 most probably means “________”.
A) thrive on
B) account for
C) originate from
D) descend from
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0ur statistics show that we consume all that we are capable of producing．
A．waste
B．buy
C．use
D．sell
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We are a young and new species in all the following senses EXCEPT that______.
A．a few thousand years is nothing in terms of evolution.
B．we are probably the sense-organ for the life on earth.
C．we often make mistakes and grope in the dark.
D．there is so much around us that we need to learn about
此题为多项选择题。
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听力原文：W: Tomorrow we are having our first test in history class. I'm really worried about it. You've taken one of Dr. Parker's tests, haven't you？ I hear they're impossible to pass.
M: I don't know who you've been talking to. My experience was just the opposite.
Q: What does the man mean？
(14)
A．He thought Dr. Parker's tests were easy.
B．Dr. Parker is no longer teaching history.
C．The woman's source of information is reliable.
D．He didn't enjoy taking history tests of Dr. Parker's.
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听力原文：Man: We work in a large open-plan setting which can be tricky at times with the sort of work we do. There are small meeting rooms where we can go to discuss things confidentially or where members of staff can talk to us in private. Of course, with the sort of information we keep, individual staff records and interview reports and so on, we have to be discreet at all time.
(21)
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听力原文：Woman: Whether in our personal or business lives, we are all at risk of having our privacy invaded. We can now offer a range of products designed to reduce the possibility of unwanted intrusion. Visit our new showroom for the latest specialist innovations including listening devices, communications equipment, personal protection, video cameras and much more.
(20)
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Human beings are animals. We breathe, eat and digest, and reproduce the same life【B1】common to all animals. In a biological laboratory, rats, monkeys, and humans seem very much the same.
However, biological understanding is not enough:【B2】itself, it can never tell us what human beings are.【B3】to our physical equipment—the naked human body—we are not an【B4】animal. We are tropical creatures,【B5】hairless and sensitive to cold. We are not fast and have neither claws nor sharp teeth to defend ourselves. We need a lot of food but have almost no physical equipment to help us get it. In the purely physical【B6】, our species seems a poor【B7】for survival.
But we have survived—survived and multiplied and【B8】the earth. Some day we will have a【B9】living on the moon, a place with neither air nor water and with temperatures that turn gases into solids. How can we have done all these things？ Part of the answer is physical.【B10】its limitations, our physical equipment has some important potentials.
Inhabitants of our eventual moon colony will bring their own food and oxygen and then create an artificial earth environment to supply necessities.
【B1】
A．processes
B．acts
C．modes
D．procedures
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We are all in favor of your proposal that the discussion__________ A．be put off B. was put off C. should put off D. is to put off
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In any country the wages commanded by laborers who have comparable skills but who work in various industries are determined by the productivity of the least productive unit of labor, i.e., that unit of labor which works in the industry which has the greatest economic disadvantage. We will represent the various opportunities of employment in a country like the United States by symbols: A, standing for a group of industries in which we have exceptional, economic advantages over foreign countries; B, for a group in which our advantages are less; C, one in which they are still less; D, the group of industries in which they are least of all.
When our population is so small that all our labor can be engaged in the group represented by A, productivity of labor (and therefore wages) will be at their maximum. When our population increases so that some of the labor will have to be set to work in group B, the wages of all labor must decline to the level of the productivity in that group. But no employer, without government aid, will yet be able to afford to hire labor to exploit the opportunities represented by C and D, unless there is a further increase in population.
But suppose that the political party in power holds the belief that we should produce every thing that we consume, that the opportunities represented by C and D should be exploited. The commodities that the industries composing C and D will produce have been hitherto obtained from abroad in exchange for commodities produced by A and B. The government now renders this difficulty by placing high duties upon the former class of commodities. This meads that workers in A and B must pay higher prices for what they buy, but do not receive higher prices for what they sell.
After the duty has gone into effect and the prices of commodities that can be produced by C and D have risen sufficiently, enterprisers will be able to hire labor at the wages prevailing in A and B, and establish industries in C and D. So far as the remaining laborers in A and B buy the products of C and D, the difference between the price which they pay for those products and the price that they would pay if they were permitted to import those products duty-free is a tax paid not to the government, but to the producers in C and D, to enable the latter to remain in business. It is an uncompensated deduction from the natural earnings of the laborers in A and B. Nor are the workers in C and D paid as much, estimated in purchasing power, as they would have received if they had been allowed to remain in A and B under the earlier conditions.
When C and D are established, workers in these industries______.
A．receive higher wages than do the workers in A and B
B．receive lower wages than do the workers in A and B
C．are not affected so adversely by the levying of duties as are workers in A and B
D．receive wages equal to those workers in A and B
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Which of the following can we draw from the given information concerning the class-map "all-traffic"？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/2b3edf249d7c9491ef9e0334bb9ca2ab.jpg' />
A. The class-map "all-traffic" will match all traffic with ip precedence 4 and 5
B. The class-map "all-traffic" will match all traffic with dscp 18 or dscp 43
C. The class-map "all-traffic" will match all traffic with ip precedence 0 or 1
D. The class-map "all-traffic" will match all traffic with dscp 18 and dscp 43
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These risk factors are not present in all social and cultural contexts, but provide an overview when we attempt to understand the causes of child maltreatment
