6．For years，scientists have argued over what killed the great Austrian composer Wolfgang Amadeus Mozart （1756-1791）．The various accounts of his final days suggest that he might have died from strep or trichinosis or rheumatic fever or renal disease or"'Now two researchers have put forth another diagnosis：a vitamin deficiency．
Uncertainty clouds Mozart's death because physicians of the time did not know how to diagnose most illness．No autopsy of his body was performed either．
Like many people of the time，Mozart was often sick．He suffered from smallpox，typhoid fever，and several respiratory infections．Illness tended to strike him between mid-October and mid-May，says William Grant，a retired U．S．a(chǎn)tmospheric scientist who is a member of the Sunlight，Nutrition and Health Research Center．Grant and Stefan Pilz，an Austrian researcher，studied more than 80references to Mozart's health in medical literature．
Mozart's poorer health between October and May may have dated from a vitamin D deficiency． says Grant．Vitamin D is the"sunshine vitamin"； the human body makes it when exposed to strong sunlight．People who live at higher latitudes don't get that exposure between late autumn and early spring．
Vitamin D aids in the absorption of calcium，a mineral that help build strong skeletons．Not enough Vitamin D can lead to tickets，a disorder marked by soft，weak bone．
Mozart's habits may have made his D deficit worse，says Grant．'The composer was a night owl who often slept through the day，thereby depriving （使喪失） himself of even more sunshine．"Mozart died on December 5，1791，two to three months into the vitamin D winter，"wrote Grant and Pilz in the journal Medical Problems of Performing Artists．Vitamin D is also involved in the operation of more than 200genes．Low vitamin D levels are linked to high blood pressure，heart disease，and many cancers．
Vitamin D deficiencies still exist among residents of the higher latitudes，say scientists．We now know what people in Mozart's day did not know，however．Milk，eggs，and oily fish are good sources of Vitamin D．So is 10to 20minutes of unprotected exposure to the sun every Summer day．
46．It is certain thatC．
A．Mozart died from renal disease
B．Many people in Mozart's time suffered from smallpox
C．Mozart was often ill between autumn and the next spring
D．William Grant knows little about Mozart'health
47．The underlined word"deficiency"in the fourth paragraph most probably means"B"．
A．the quality of doing something well
B．a(chǎn) lack of something that is necessary
C．a(chǎn) weakness or fault in something
D．a(chǎn) choice or judgment that you make after a discussion
48．Which of the following is NOT TRUE about Mozart？D．
A．'Physicians of Mozart's day didn't know much about his illness
B．Mozart lived at a high latitude
C．Mozart often worked at night and slept during the daytime
D．Mozart was 45years old when he died
49．What is the text mainly about？B．
A．Stories about Mozart
B．A probable death cause of the great Austrian composer
C．The importance of Vitamin D
D．Good sources of Vitamin D．
分析 本文屬于記敘文閱讀，作者通過這篇文章向我們介紹了偉大的奧地利作曲家莫扎特的一個(gè)可能的死亡原因，莫扎特的健康狀況并不是很好，他經(jīng)常在十月和五月的時(shí)候生病，醫(yī)生覺得他生病的原因可能是因?yàn)樗狈S生素D，而他的生活習(xí)慣是導(dǎo)致他缺乏維生素D的原因．
解答 46．D 細(xì)節(jié)理解題，根據(jù)第三段Illness tended to strike him between mid-October and mid-May，says William Grant，a retired U．S．a(chǎn)tmospheric scientist who is a member of the Sunlight．可知莫扎特的健康狀況不好，經(jīng)常在十月和五月生病，故選D．
47．B 詞義猜測(cè)題，根據(jù)第四段Mozart's poorer health between October and May may have dated from a vitamin D deficiency． says Grant．可知莫扎特在十月以及五月經(jīng)常生病可能是因?yàn)樗狈S生素D，聯(lián)系句意即可得出"deficiency"指的是缺乏，故選B．
48．D 細(xì)節(jié)理解題，根據(jù)第一段For years，scientists have argued over what killed the great Austrian composer Wolfgang Amadeus Mozart （1756-1791）．可知莫扎特是在1756年出生，在1791年去世，因此可知他是在35歲時(shí)去世，而不是4歲，故選D．
49．B 主旨大意題，通讀全文可知作者在本文中主要向我們介紹了偉大的奧地利作曲家莫扎特的一個(gè)可能的死亡原因，故選B．
點(diǎn)評(píng) 考查學(xué)生的細(xì)節(jié)理解和推理判斷能力．做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確選擇．在做推理判斷題時(shí)不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．
