A.will influence the future of America
B.will soon be over, because times are bound to change
C.is of interest mostly to Harvard men and their friends
D.is a sad symbol of our general bewilderment
第1题
A.will influence the future of America
B.will soon be over, because times are bound to change
C.is of interest mostly to Harvard men and their friends
D.is a sad symbol of our general bewilderment
第2题
A.the suction pressure to decrease
B.the suction temperature to increase
C.increased ice formation on the evaporator coil
D.excessive short cycling of the compressor
第3题
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文: During this century, archaeologists have discovered that trees can be a valuable tool for measuring time. In scientific terms, this method is called dendrochronology. Dendrochronology is based on the scientific discovery that each year a tree grows a new layer of wood. When you cut down a tree, for example, you can see and count the layers of concentric circles. These circles will reveal a great deal of information. The layers vary in color and in thickness. These variations are a result of differing climate conditions from year to year that affect the growth of the annual tings. Cold weather, for example, creates thinner and lighter tings while hot weather produces thicker and darker rings. All trees that grow in the same region will have roughly the same pattern of annual rings, and this can be used as a source of comparison and measurement.
Early in this century, archaeologists began using the rings to date ruined structures and figures built in the southwestern United States. They did this by comparing the rings of the wood found in the ruins with the rings of recently cut trees. Slowly but surely, the system was extended backwards in time to measure older ruins. The heavy forestry of the United States, coupled with the relative youth of its history, led to a fairly uncomplicated study. Eventually, dendrochronology produced an accurate time and weather record for the American southwest that extended over 2000 years.
What happens to trees each year?
A.Their tings get thinner and thinner.
B.They add a ring of wood.
C.Their rings get darker in color.
D.They become more valuable.
第4题
The process of vaccination allows the patient's body to develop immunity to the virus or disease so that, if it is encountered, one can fight it off naturally. To accomplish this, a small weak or dead strain of the disease is actually injected into the patient in a controlled environment, so that his body's immune system can learn to fight the invader properly. Information on how to penetrate the disease's defenses is transmitted to all elements of the patient's immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that, should the patient later come into contact with the real problem, his body is well equipped and trained to deal with it, having already done so before.
There are dangers inherent in the process, however. On occasion, even the weakened version of the disease contained in the vaccine proves too much for the body to handle, resulting in the immune system succumbing, and, therefore, the patient's death. Such is the case of the smallpox vaccine, designed to eradicate the smallpox epidemic that nearly wiped out the entire Native American population and killed massive numbers of settlers. Approximately one in 10,000 people who receives the vaccine contract the smallpox disease from the vaccine itself and dies from it. Thus, if the entire population of the United States were to receive the Smallpox Vaccine today, 3000 Americans would be left dead.
Fortunately, the smallpox virus was considered eradicated in the early 1970's, ending the mandatory vaccination of all babies in America. In the event of a re-introduction of the disease, however, mandatory vaccinations may resume, resulting in more unexpected deaths from vaccination. The process, which is truly a blessing, may indeed hide some hidden curses.
How do vaccines protect humans from diseases according to paragraph 2?
A.By training the immune system to fight weaker versions of the disease.
B.By passing information on how to fight the disease to the immune system.
C.By weakening the disease so that the immune system can defeat it.
D.Introducing the disease to the body, so that survivors have already fought it.
第5题
Anti-malarial drugs are being shipped to the region by the International Federation of the Red Cross (IFRC) An IFRC representative who visited the area last week his returned to Geneva with his assessment.
Medical teams from the Indian Army are also helping. The government reportedly is concerned about the possibility the disease will spread among the hundreds of troops deployed along the Indo-Burmese border in counter-insurgency operations.
These medical teams are dealing with an outbreak of ______.
A.plague
B.measles
C.malaria
D.rabies
第6题
A variety of conditions can affect the success or failure of negotiations (谈判). The following conditions make success in negotiations more likely.
First, both parties must be willing to participate. If one party is unwilling for the negotiation, the ___32___ for reaching any agreement will certainly ___33___.
Second, people must get ready to discuss. When there is not enough information ___34___, or a negotiation strategy unprepared, people may be ___35___ to begin the discussion.
Third, both parties must have enough interests in common to ___36___ themselves to a shared decision-making discussion. For people to settle disagreement, they must have some means to ___37___ the attitudes and behavior. from the other party. To ___38___ a change, they may provide needed information and seek the advice of experts for help.
Finally, participants must have the ___39___ to make a decision. If not, negotiations will be limited to an information exchange between the parties. ___40___, both parties must have a willingness to ___41___. In other words, sometimes, to reach a satisfactory conclusion, it is necessary for the parties prepared to have less than 100 percent of needs or interests satisfied.
A、effect
B、affect
C、commit
D、decrease
E、decline
F、influence
G、compromise
H、concede
I、available
J、applicable
K、reluctant
L、furthermore
M、necessity
N、authority
O、potential
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!