题目内容
62
查看答案
搜索结果不匹配？点我反馈
更多问题
半胱氨酸在代谢的过程中，可被氧化成______，它是______的组成成分，有助于促进脂类的消化吸收。
A Sunshade for the Planet
？？ Evenwith the best will in the world,reducing our carbon emissions is not going toprevent global warming. It has become clear that even if we take the moststrong measures to control emissions, the uncertainties in our climate modelsstill leave open the possibility of extreme warming and rises in sea level. Atthe same time,resistance by governments and special interest groups makes itquite possible that the actions suggested by climate scientists might not beimplemented soon enough.？？
？？ Fortunately,if the worst comes to the worst,scientists still have a few tricks up their sleeves. For the most part theyhave strongly resisted discussing these options for fear of inviting a sense ofcom- placency that might thwart efforts to tackle the root of the problem.Until now, that is. A growing number of researchers are taking a fresh look atlarge-scale "geo-engineering" projects that might be used tocounteract global warming. "I use the analogy of methadone," saysStephen Schneider,a cli- mate researcher at StanfordUniversity in California who was among the first to drawattention to global warming. "If you have a heroin addict, the correcttreatment is hospitalization,and a long rehab. But if they absolutelyrefuse,methadone is better than heroin. "？？
？？ Basically the idea is to apply "sunscreen" to the wholeplanet. One astronomer has come up with a radical plan to cool Earth;launchtrillions of feather-light discs into space, where they would form. a vast cloudthat would block the sun's rays. It's controversial,but recent studies suggestthere are ways to deflect just enough of the sunlight reaching the Earth'ssurface to counteract the warming produced by the greenhouse effect. Globalclimate models show that blocking just l. 8 per cent of the incident energy inthe sun's rays would cancel out the warming effects produced by a doubling ofgreenhouse gases in the atmosphere. That could be crucial,because even the mostsevere emissions-control meas- ures being proposed would leave us with a doublingof carbon dioxide by the end of this century,and that would last for at least acentury more.？？
？？According to the first two paragraphs, theauthor thinks that _________？
？？What is NOT the result of consuming fossil fuels according to the last paragraph？？？
Once Daily Pill Could Simplify HIV Treatment
？？ Bristol-Myers Squibb and Gilead Scienceshave combined many HIV drugs into a single pill. Some- times the best medicineis more than one kind of medicine. Malaria, tuberculosis andHIV/AIDS,___________ (51), are all treated with combinations of drugs. But thatcan mean a lot of pill to take. It wouldbe _______________ (52) drug companiescombined all the medicines into a single pill, taken just once a day.？？
？？ Now,two companies say they have done that for people just ___ (53) treatment for HIV, the virus that causesAIDS. The companies are Bristol-Myers Squibb and Gilead Science. They have ___________(54) a single pill that combinesthree drugs currently on the market. Bristol-Myers Squibb sells one of them___________ (55) the name of Sustiva. Gilead combined the ________________(56), Emtriva and Viread, into a single pill in two thousand four.？？
？？ Combining drugs involves more than _________(57) issues. It alsoinvolves issues of competition _______(58) the drugs are made by different companies. The newonce-daily pill is the result of _________(59) is described as the first joint venture agreement of itskind in the treatment of HIV. In January the New England Journal of Medicinepublished a study of the new pill. Researcher compared its _(60) to that of the widely usedcombination of Sustiva and Combivir. Combivir ________ (61) two drugs, AZT and3TC. The researchers say that after one year of treatment, the n ew pill sup-pressed HIV levels in more patients and with fewer ________________(62)effects. Gilead paid for the study. Professor Joel Gallant at the Johns HopkinsSchool of Medicine in Baltimore, Maryland, led the re- search. He is a paidadviser to Gilead and Bristol-Meyers Squibb as well as the maker of Combivir,G1- axo Smith Kline.？？
？？GlaxoSmith Kline reacted ___(63) the findings by saying that a single study is oflimited value. It says the effectiveness of Combivir has been shown in each ofmore than fifty studies. The price of the new once-daily pill has not been announced.But Gilead and Bristol-Myers Squibb say they will provide it at reduced cost todeveloping countries. They plan in the next few months to ask the United
？？ States Foodand Drug Administr？？ation to approve the new pill.,？？
？？There are limits to who could take it __(64) the different drugs itcontains. For example, __________(65) women are told not to take Sustivabecause of the risk of birth disorders. Experts say more than forty millionpeople around the world are living with HIV.
51？？
微信支付 
支付宝支付