第12题: [单项选择]Passage Three Questions 32 to 35 are based on the passage you have just heard. A. In the 17th century. B. In the 15th century. C. In the 18th century. D. In the 16th century. 参考答案:D 答案解析:[听力原文]32-35 When Mr. Finch retired, he bought a small cottage in a seaside village. (32) The
第13题: [单项选择]正常情况下胃黏膜不会被胃液所消化是由于() A. 胃液中不含有可消化胃黏膜的酶 B. 黏液一碳酸氢盐屏障的作用 C. 胃液中的内因子对胃黏膜具有保护作用 D. 胃液中的糖蛋白可中和胃酸 E. 胃液中含有大量的碳酸氢根,可中和胃液 参考答案:B 答案解析:正常情况下胃黏膜不会被胃液所消化是由于黏液一碳酸氢盐屏障的作用。