American researchers have developed a technique that may bee an important tool in fighting AIDS virus from attacking its target-cells in the body's defense system．When AIDS virus enters the blood，it searches for blood cells called T4 lymphocytes(淋巴细胞)．The virus connects to the outside of T4 lymphocytes．Then it forces its way inside．There it directs the cells' genetic material to produce copies of the AIDS virus．This is how AIDS spreads．
Researchers think they may be able to stop AIDS from connecting to T4 ceils．When AIDS virus finds a T4 cell，it actually connects to a part of the cell called CD4 protein．
Researchers want to fool the virus by putting copies or clones of the CD4 protein into the blood．This way the AIDS virus will connect to cloned protein instead of the real ones．Scientists use genetic engineering methods to make the clones．Normally a CD4 protein remains on the T4 cell at all times；the AIDS virus must go to it．
In a new technique，however，the cloned CD4 protein is not connected to a cell．It floats freely，so a lot more can be put into the blood to keep the AIDS virus away from real CD4 protein on T4 cells．One report says the．AIDS virus connects to cloned protein just as effectively as it connects to real protein．That report was based on tests with blood cells grown in labs．The technique is just now beginning to be tested in animals．If successful，it may be tested in humans within a year．
【小题1】The new technique can .A．cure AIDSB．kill the AIDS virusC．prevent the AIDS virus from spreadingD．produce new anti-AIDS cells【小题2】When the AIDS virus enters the blood，it is reproduced by .A．itselfB．the blood cellsC．the CD4 proteinD．the genetic material of T4 lymphocytes【小题3】The AIDS virus connects to cloned protein instead of the real CD4 protein because .A．cloned protein stays On the T4 cellsB．it connects to cloned protein more effectivelyC．cloned protein is made by genetic engineering methodsD．cloned protein floats freely，and many more can be put into the blood【小题4】Which of the following statements is NOT true?A．The new technique has been tested in labs．B．The new technique is being tested in animals．C．The new technique may be tested in humans．D．The new technique is now under clinic test．【小题5】The best title for this passage is ．A．AIDS-a deadly diseaseB．A new technique in fighting AIDSC．The spread of AIDS virusD．The cloned CD4 proteinC
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(答案→)C
解析：文章介绍了一种新的治疗AIDS病的疗法。
【小题1】推理题。根据第二段When AIDS virus finds a T4 cell，it actually connects to a part of the cell called CD4 protein．可知这样做是别人AIDS病毒接触到真正的T4 lymphocytes，实际上是阻止AIDS的传播。
【小题2】细节题。根据第一段的第四行There it directs the cells' genetic material to produce copies of the AIDS virus．
【小题3】细节题。根据最后一段第2,3行It floats freely，so a lot more can be put into the blood to keep the AIDS virus away from real CD4 protein on T4 cells．
【小题4】细节题。根据最后一段最后两行That report was based on tests with blood cells grown in labs．The technique is just now beginning to be tested in animals。
【小题5】主旨大意题。通读全文尤其是主题段第一段可知文章介绍了一种新的治疗AIDS病的疗法。