1000头清真优质肉牛养殖项目可行性研究报告(编辑修改稿)

1000头清真优质肉牛养殖项目可行性研究报告(编辑修改稿)内容摘要：

. There are m any different vi ruses, for exampl e, the fl u vi rus or the SARS vi rus. H IV weakens a person‟s im mune system。 that i s, the part of the body that fi ghts di sease. You can have H IV i n your bl od for a l ong tim e, but eventual y H IV wil l dam age your im mune system so m uch that your body can no l onger fi ght disease. Thi s stage of the i l ness i s cal ed AIDS. If you develop AIDS, your chances of survival are very sm al l. H IV i s spread through bl ood or the fl ui d that the body m akes during sex. For a person to be e infected, bl ood or sexual fl ui d that carri es the vi rus, has to get insi de the body through broken ski n or by injecti on. O ne day sci enti sts wi l fi nd a cure for H IV/AIDS. Until that happens, you need to protect yoursel f. H ere are som e thi ngs you can do to m ake sure you stay safe. If you i nject drugs: do not share your needl e wi th anyone el se. Bl ood from another person can stay on or in the needl e. If a person has H IV and you use the sam e needl e, you coul d i nject the vi rus i nto your own bl ood. do not share anythi ng el se that a person has used whi l e injecti ng drugs. Bl ood coul d have spi lt on it. If you have sex wi th a m al e or a fem al e: use a condom. Thi s wi l prevent sexual fl ui d passi ng from one person to another. The fol owing statem ents are NO T true. A person cannot get H IV the fi rst ti m e they have sex. WRON G. If one sexual partner has H IV, the other partner coul d be e infected. You can tel by l ooking at som eone whether or not they have H IV. WRO N G. Many peopl e carryi ng H IV l ook perfectly heal thy. It i s onl y when the di sease has progressed to AIDS that a person begi ns to l ook si ck. O nl y hom osexual s get AIDS. WRON G. Anyone who has sex wi th a person i nfected wi th H IV/AIDS ri sks geti ng the virus. Wom en are sl i ghtl y m ore l i kel y to be e i nfected than m en. If you hug, touch or ki s som eone with AIDS or vi sit them i n thei r hom e, you wi l get H IV/AIDS. WRO N G. You can onl y get the di sease from bl ood or sexual fl ui d. Unfortunatel y, peopl e wi th H IV som eti mes l ose thei r fri ends because of prejudi ce. Many peopl e are afrai d that they wil l get H IV/AIDS from those i nfected wi th H IV/AIDS. For the sam e reason, som e AIDS pati ents cannot fi nd anyone to look after them when they are sick. You can get HIV/AIDS from m osqui toes. WRO N G. There i s no evi dence of thi s. Uni t 4 TH E EARTH IS BECOMIN G WARMER BUT DO ES IT MATTER? During the 20th century the tem perature of the earth rose about one degree Fahrenhei t. That probabl y does not seem m uch to you or m e, but i t i s a rapi d increase when pared to other natural changes. So how has thi s e about and does i t m atter? Earth Care‟s Sophi e Arm strong expl ores these questions. There i s no doubt that the earth is bei ng warm er (see Graph 1) and that i s i t hum an acti vi ty that has caused thi s global warm i ng rather than a random but natural phenom enon. Al l sci enti sts subscri be to the vi ew that the i ncrease i n the earth‟s tem perature i s due to the burni ng of fossi l fuel s li ke coal, natural gas and oi l to produce energy. Som e byproducts of this process are cal ed “greenhouse” gases, the m ost im portant one of whi ch i s carbon dioxi de. Dr Jani ce Foster explai ns: “There i s a natural phenom enon that sci enti sts cal l the „greenhouse efect‟. Thi s is when sm al am ounts of gases i n the atm osphere, li ke carbon dioxi de, m ethane and water vapor, trap heat from the sun and therefore warm the earth. Wi thout the „greenhouse effect‟, the earth woul d be about thi rtythree degrees Cel si us cool er than i t is. So, we need those gases. The probl em begi ns when we add huge quanti ti es of extra carbon di oxi de i nto the atm osphere. It m eans that m ore heat energy tends to be trapped i n the atm osphere causi ng the global tem perature to go up. ” We know that the l evel s of carbon di oxi de have i ncreased greatl y over the l ast 100 to 150 years. It was a sci enti st cal ed Charles Keeli ng, who m ade accurate m easurem ents of the am ount of carbon di oxi de i n the atm osphere from 1957 to 1997. H e found that between these years the carbon di oxi de i n the atm osphere went up from around 315 parts to around 370 parts per m il li on (see Graph 2). Al l sci enti sts accept thi s data. They also agree that i t is the burni ng of m ore and m ore fossi l fuel s that has resul ted i n this i ncrease i n carbon di oxi de. So how hi gh wi l the tem perature i ncrease go? Dr Jani ce Foster says that over the next 100 years the am ount of warmi ng coul d be as l ow as 1 to 1. 5 degrees Cel si us, but i t coul d be as hi gh as 5 degres. H owever, the ati tudes of sci enti sts towards thi s ri se are pl etel y di fferent. O n the one hand, Dr Foster thi nks that the trend whi ch i ncreases the tem perature by 5 degrees woul d be a catastrophe. She says, “We can‟t predi ct the cl im ate wel enough to know what to expect, but i t coul d be very seri ous. ” Others who agree wi th her thi nk there m ay be a ri se of several m etres i n the sea l evel , or predict severe storm s, fl oods, droughts, fam i nes, the spread of diseases and the di sappearance of speci es. O n the other hand, there are those, li ke Gee H am bley, who are oposed to thi s vi ew and beli eve that we shoul d not worry about hi gh l evel s of carbon di oxi de i n the ai r. They predi ct that any warm i ng wil l be mi l d with few bad envi ronmental consequences. In fact, H am bl ey states, ” More carbon di oxi de i s actual l y a positi ve thi ng. It wil l make pl ants grow qui cker。 crops wil l produce m ore。 i t wi l encourage a greater range of anim al s – al of whi ch wi l m ake li fe for hum an bei ngs beter.” Greenhouse gases conti nue to buil d up i n the atm osphere. Even i。