s="" body="" to="" develop="" immunity="" the="" virus="" or="" disease="" so="" that,="" if="" it="" is="" encountered,="" one="" can="" ward="" off="" naturally.="" accomplish="" this,="" a="" small="" weak="" dead="" strain="" of="" actually="" injected="" into="" patient="" in="" controlled="" environment,="" that="" his="" body’s="" immune="" system="" learn="" fight="" invader="" properly.="" information="" on="" how="" penetrate="" disease's="" defenses="" transmitted="" all="" elements="" patient's="" process="" occurs="" naturally,="" which="" genetic="" passed="" from="" cell="" cell.="" this="" makes="" sure="" should="" later="" come="" contact="" with="" real="" problem,="" well="" equipped="" and="" trained="" deal="" it,="" having="" already="" done="" 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 1 in 10,000 people who receive the vaccine contract the smallpox disease from the vaccine itself and die 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 mixed blessing, may indeed hide some hidden curses.1.The best title of the text may be （ ）.2.What does the example of the Smallpox Vaccine illustrate?3.The phrase “ward it off naturally” (Paragraph 2) most probably means （ ）.4.Which of the following is true according to the text?5.The purpose of the author in writing this passage is（ ）.'>
When a disease of epidemic proportions rips into the populace, scientists immediately get to Work, trying to locate the source of the affliction and find ways to combat it. Oftentimes, success is achieved, as medical science is able to isolate the parasite, germ or cell that causes the problem and finds ways to effectively kill or contain it. In the most serious of cases, in which the entire population of a region or country may be at grave risk, it is deemed necessary to protect the entire population through vaccination, so as to safeguard lives and ensure that the disease will not spread.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 ward 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 1 in 10,000 people who receive the vaccine contract the smallpox disease from the vaccine itself and die from it. Thus, if the entire population of the United S
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s="" called="" “the="" glass="" ceiling.”="" failure="" to="" attain="" the="" topmost="" jobs="" in="" some="" cases="" is="" （4）="" lack="" of="" experience="" or="" （5）="" education.="" because="" gender="" （6）="" has="" kept="" women="" out="" management="" until="" recent="" years,="" they="" have="" not="" had="" time="" （7）the="" years="" that="" are="" （8）="" most="" high-ranking="" executives.="" also="" earlier="" were="" （9）="" from="" entering="" graduate="" schools="" engineering,="" science,="" business,="" and="" law="" which="" been="" （10）="" corporate="" management.="" even="" as="" those="" barriers="" lowered,="" though,="" remain="" （11）="" at="" executive="" levels.="" a="" group,="" yet="" （12）="" ceiling="" become="" chief="" officers="" board="" chairpersons.="" something="" continues="" hold="" them="" back.In one authoritative study, women executives （13） three kinds of pressures that complicated their professional advancements: the day-to-day, year-in-year-out demands and the hectic(忙乱的) （14） of executive work; their （15） role as “first woman executive” and the special need to prove themselves to others; and the strain of meeting family （16） .In other words these women managers faced all of the normal demands of executive work that men, experience plus two additional requirements （17） to their customary roles in society. Having proven managerial talent was not enough. Psychologically, they had to prove themselves the equal of men. Socially, they found themselves carrying a （18） share of family responsibilities. These psychological and social （19） can hold back the most skilled and dedicated manager, even in companies where gender prejudice is （20）a minimum.
'>Although women are as competent as men in managing people and organization, they still do not attain the highest positions in corporations. Their（1）seems to be （2） by an invisible barrier. At some point, they （3） what's called “the glass ceiling.” Failure to attain the topmost jobs in some cases is （4） lack of experience or （5） education. Because gender （6） has kept women out of management until recent years, they have not had time to （7）the years of experience that are （8） of most high-ranking executives. Also in earlier years, women were （9） from entering graduate schools of engineering, science, business, and law which have been （10） to corporate management. Even as those barriers have been lowered, though, women remain （11） at executive levels. As a group, they have not yet （12） the glass ceiling to become chief executive officers or board chairpersons. Something continues to hold them back.In one authoritative study, women executives （13） three kinds of pressures that complicated their professional advancements: the day-to-day, year-in-year-out demands and the hectic(忙乱的) （14） of executive work; their （15） role as “first woman executive” and the special need to prove themselves to others; and the strain of meeting family （16） .In other words these women managers faced all of the normal demands of executive work that men, experience plus two additional requirements （17） to their customary roles in society. Having proven managerial talent was not enough. Psychologically, they had to prove themselves the equal of men. Socially, they found themselves carrying a （18） share of family responsibilities. These psychological and social （19） can hold back the most skilled and dedicated manager, even in companies where gender prejudice is （20）a minimum.
A.access B.ascent C.lubricated D.restrained问题2： A.blocked B.prohibited C.lubricated D.restrained问题3： A.collide B.knock down C.coincide D.bump into问题4： A.on account of B.thanks to C.accounting for D.due to问题5： A.intact B.inadequate C.incapable D.undesirable问题6： A.disposition B.differentiation C.displacement D.bias问题7： A.elevate B.acquire C.disperse D.overestimate问题8： A.typical B.peculiar C.exemplary D.indispensable问题9： A.avoided B.discouraged C.deprived D.restricted问题10： A.pathway B.means C.tracks D.trails问题11： A.underrated B.underpopulated C.underprivileged -
Your story about the frog turning into a prince is （ ）nonsense.
A.shear B.sheer C.shield D.sheet -
Doctors are interested in using lasers as a surgical tool in operations on people who are （ ）to heart attack.
A.prone B.disposed C.infectious D.accessible -
It was during summer breaks that we first taste the satisfaction work that （ ）into hard currency.
A.translates B.transfers C.transplants D.transmits -
It is a generous and receptive intelligence that was （ ）from attaining its full scope by bad training, poor school and lack of opportunity.
A.foiled B.thwarted C.balked D.inhabited