Question

15．For thousands of years，people have used plants to make medicines．They used different parts of the plants-the roots，the leaves，the flowers，and the bark （樹皮）．Today，doctors have rediscovered more medicinal values （藥用價值） of some plants．Let's look at some examples．
    Foxglove is a common plant．People have used it to make the heart slow down．Recently scientists have developed another drug from it．This new drug helps prevent other heart problems．
    In some areas，malaria has been a problem．Scientists have learned that the bark of a South American tree，the cinchona，can be made into a drug to prevent malaria．For a long time，the Chinese have known that a special plant，wormwood，can also fight malaria．Scientists have been working with it to develop new drugs against malaria．
    In Germany，some scientists studied garlic （大蒜） for four years．They found that it helps prevent the build-up of plaque （血小板） because too much plaque is bad for health．This very common plant continues to be studied．
As we know，there are about 250，000 kinds of flowering plants in the world．Scientists have only studied little more than one percent of plants for their medicinal value．Maybe medicines for AIDS and cancer will be made f rom the other 99 percent．
52．What can foxglove be used for？D
A．Studying plants．
B．Building up the plaque．
C．Treating AIDS and cancer．
D．Preventing heart problems．
53．What does the underline d word"malaria"in Paragraph 3 refer to （指的是）？C
A．A drug．
B．A scientist      
C．An illness．
D．An animal．
54．How many plants are mentioned in the passage？B
A.3．
B.4．
C.5．
D.6
55．Which of the following is the best title for the passage？B
A．Past and future                 
B．Plants and medicine
C．Health and illness               
D．Scientists and doctors．

Answer 1

分析 文章大意：這篇短文主要講述了一些利用植物防治疾病的知識．

解答 52-55：DCBB
52題答案：D 細節(jié)題．根據(jù)短文第二段描述This new drug helps prevent other heart problems．可知，毛地黃主要用來防治心臟病，故選D．
53題答案：C 詞匯題． 根據(jù)第三段下文the cinchona，can be made into a drug to prevent malaria．金雞納，可制成藥物來預防瘧疾 可知這是一種疾病，故選C．
54題答案：B 細節(jié)題．根據(jù)短文描述，可知主要提到四種植物，F(xiàn)oxglove毛地黃，the cinchona金雞納，wormwood艾草和 garlic大蒜．故選B．
55題答案：B 主旨題．根據(jù)最后一段Scientists have only studied little more than one percent of plants for their medicinal value．Maybe medicines for AIDS and cancer will be made f rom the other 99 percent．主要講述了一些草藥知識，故選B，植物和醫(yī)藥．

點評 本文是一篇日常生活類閱讀，題目涉及多道細節(jié)理解題，做題時結合原文和題目有針對 性找出相關語句進行仔細分析，結合選項選出正確答案．推理判斷也是要在抓住關鍵句子的基礎上合理的分析才能得出正確的答案．