2015年职称英语考试理工类完形填空专项练习题(4)

　　New Technique Promises Earlier Cancer Detection

　　A new technique could revolutionize the early detection of cancer, giving sufferers a greater chance of beating the disease, American scientists said. Researchers at the Massachusetts Institute of Technology have devised a novel method of________ changes in the nucleus of cells in the earliest stages of the disease. More than 85 percent of all cancers originate in the epithelium that lines the internal surfaces of organs________ the body. Although these are treatable________ they are diagnosed in one of the preventable stages, early body damages are almost ________ to detect, said scientist Feld. We present a new optical-probe technique based on light-scattering spectroscopy that is able________ detect pre-cancerous and early cancerous cells in cell-rich epithelia, he added in a statement.

　　The new technique relies on the fact ________ cell nuclei change in the early stages of cancer and the differences scatter light in a characteristic way. Until now the changes were only detectable________ a biopsy was taken, the scientists said. The new technique, ________ in the science journal Nature, can be used in conjunction with a routine cancer screening and surveillance technique which uses an endoscope -a flexible optical probe ________ with cameras which is inserted into a cavity in the body-to check ________ cancers.

　　The scientists said they________ their new technique in four different organs during routine endoscopic cancer screening. The tip of the optical probe was brought into contact with the tissue to be tested and the scattering of light was recorded without the need for any tissue to be________, the scientists said. Our results show that light-scattering spectroscopy has the potential to detect pre-cancerous body damages and pre-invasive cancers throughout the body. This technique should ________ reprove the efficiency of cancer screening and surveillance, the scientists said. Cancer s one of the biggest　　________ in industrialized countries. ________ to figures from the World Health Organization, 10 million people were diagnosed with the disease worldwide in 1997 and six million died.

　　1 A stopping B accelerating C detecting D delaying

　　2 A with B throughout C without D for

　　3 A if B unless C whether D whereas

　　4 A capable B impossible C possible D responsible

　　5 A for Bat C of D to

　　6 A when B how C that D why

　　7 A after B before C although D near

　　8 A determined B directed C planned D described

　　9 A contracted B equipped C issued D coping

　　10 A against B with C for D like

　　11 A had tested B had to test C have tested D have been testing

　　12 A covered B removed C found D pressed

　　13 A severely B doubtfully C hardly D significantly

　　14 A sufferers B gainers C killers D losers

　　15 A According B As C Running D Responding

　　【参考答案】

　　1. C　　2. B　　3. A　　4. B　　5. D

　　6. C　　7. A　　8. D　　9. B　　10. C

　　11. A　 12. B　 13. D　 14. C　 15. A