职称英语考试

【单选题】Cancer1.Cancer, which may arise from any type of cell and in any body tissue, is not a single disease but a large number of diseases classified according to the tissue and type of cell of origin. Several hundred such classes exist, constituting three major subtypes; sarcomas, carcinomas, leukemias and lymphomas.2.
A、number of factors produce cancer in a proportion of exposed individuals.Among these factors are heredity, viruses, ionizing(离子)radiation, chemicals, and alterations in the immune system. For a long time these various factors seemed to work in different ways, but now researchers are studying how they might interact.3. More than 1,350,000 new cases of cancer occur in the United States each year. It is the second leading cause of death in the nation, accounting for about 550,000 deaths annually. The incidence of cancer varies enormously among different geographic areas. The age-adjusted death rate from all cancers in males is 310. 9 per 100,000 in Luxembourg (the highest) asCompared to 37. 5 inEl Salvador (the lowest). For women it is 175.2 inDenmark and 48.7 inEl Salvador. The figures for the United States are 216. 6 per 100,000 men and 136.5 per 100,000 women.4. The principal approach to curing cancer is to remove all of the malignant (恶性的) cells by a surgical operation. In the past this meant the removal of all of the involved tissue and as much tumors, notably cancer of the breast, this is not always necessary. However, it may help to relieve symptoms.5. The most important preventive measure in controlling cancer is stopping tobacco use, which is the cause of 30 percent of all deaths from cancer.
A、large reduction might follow better diet: optimal (适当的)calorie intake to avoid obesity (肥胖), reduction of calories form fat to 20 percent of the diet, reduction of redmeat intake, and increased intake of dietary fiber and protective foods.
A、Causes of cancerB、 Types of cancerC、Control cancerD、 The attitude faced to cancerE、 Mortality Rate from cancerF. Treating cancer by surgery This passage 5 mainly discussed_________
网考网参考答案：C
网考网解析：
从文章第五段可以看出，将来如何防治癌症，控制癌症患者发病率是主要应对策略。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>