今天小编给大家带来19年全国英语等级考试三级模拟试题套阅读，希望对大家有所帮助。
　　阅读B模拟试题：
　　Even though ulcers appear to run in families,lifestyle plays more of a role than genetic factors in causing the illness,according to a report in the April 13th Journal of Internal Medicine.In particular,smoking and stress in men and the regular use of pain-releasing medicines in women were linked with an increased risk of developing an ulcer.
　　Overall,61%of ulcer risk appears to be due to environmental factors,such as smoking,and the remaining 39%is due to genes according to Dr.Ismo Raiha of the University of Turky and colleagues at the University of Helsinki,Finland.Some researchers had suggested that families may spread Helicobacteria pylori,the bacteria that can cause ulcers.However,the new study suggests this is unlikely,according to the report.
　　Raiha and colleagues studied data from more than 13,000 pairs of twins"to examine the roles of genetic and environmental factors in the origin of peptic ulcer disease,"they explain.Both twins were more likely to develop an ulcer if the pair were genetically the same as compared with a pair of fraternal twins,suggesting that there must be some genetic susceptibility to ulcer development.
　　However,the risk was no greater in twins living together compared with twins living apart,suggesting that shared exposure to H.pylori was not to blame."Environment effects were not due to factors shared by family members,and they were related to smoking and stress in men and the use of analgesics in women,"the authors wrote."The minor effects of shared environment to disease liability do not support the concept that the grouping of risk factors,such as H.pylori infection,would explain the genetic factor of peptic ulcer disease,"they concluded.
　　1、The passage argues that
　　A.ulcers are related to genes.
　　B.ulcers are related to lifestyle.
　　C.ulcers appear in men and women.
　　D.ulcers are caused by pylori infection.
　　参考答案：B
　　参考解析：根据一、段内容，lifestyle plays more of a role than genetic factors in causing the illness,according to a report in the April 13th Journal of Internal Medicine.
　　2、According to the passage,which of the following is a very likely cause of ulcer in men?
　　A.Smoking and stress.
　　B.Drinking and smoking.
　　C.Genes and children.
　　D.Use of a certain medicine.
　　参考答案：A
　　参考解析：根据一、段内容，In particular,smoking and stress in men and the regular use of pain-releasing medicines in women were linked with an increased risk of developing an ulcer.
　　3、What factors contribute to over half the ulcers?
　　A.Hereditary factors.
　　B.Economic factors.
　　C.Environmental factors.
　　D.Genetic factors.
　　参考答案：C
　　参考解析：根据第二段首句，Overall,61%of ulcer risk appears to be due to environmental factors,
　　4、In relation to ulcers,experts study twins in order to examine
　　A.the roles of genetic factors.
　　B.the roles of environmental factors.
　　C.the roles of both factors.
　　D.the roles of brotherhood.
　　参考答案：C
　　参考解析：根据第三段内容，to examine the roles of genetic and environmental factors in the origin of peptic ulcer disease.