wastes(大小便失禁). other warnings are the appearance of white areas on the mouth dark red areas of skin that do not disappear and a higher than normal body temperature 26. Which of the following statements is NoT mentioned in the passage? A)As many as 350 thousand persons have AIDs B)The AIDS virus is carried in a persons body fluids. C)There's no vaccine medicine to prevent AIDS D)The AIDs virus is not spread by mosquitoes 27 Concerning the ways the AIDs virus can be passed, which of the following statements is wrong? A)An AIDs mother can pass on the virus to her unborn child B)The AIDs virus can be passed on through infected blood CThe AIDs virus can be passed on by shaking hands and sharing belongings D)The AIDs virus is passed sexually. 28.The expression a pregnant woman"(Para. 3)means A)a woman who has an unborn child in the body B)a woman who is taking drug C)a woman who has the AIDs virus D)an unmarried mother 29. The fifth paragraph is mainly about A)the results of an AIDs infection B)the possible symptoms of an AIDS infection C)how the AIDS virus is spread D)the diseases AiDs patients easily have 30. When the aids virus attacks our defense system A)it starts to destroy our white blood cells B)we begin to feel tired C)it means we will die very soon D)our white blood cells can control it Passage 3 Questions 31 to 35 are based on the following passage For some time past it has been widely accepted that babies -and other creatures-learn to do things because certain acts lead to rewards"; and there is no reason to doubt that this is true. But it used also to be widely believed that effective rewards, at least in the early stages, had to be directly related to such basic physiologica(生理的)“ drives” as thirst or hunger. In other words, a baby would learn if he got food or drink or some sort of physical comfort, not otherwise It is now clear that this is not so Babies will learn to behave in ways that produce results in the world with no reward except the successful outcomewastes(大小便失禁). Other warnings are the appearance of white areas on the mouth ,dark red areas of skin that do not disappear and a higher than normal body temperature. 26.Which of the following statements is NOT mentioned in the passage? A)As many as 350 thousand persons have AIDS. B)The AIDS virus is carried in a person’s body fluids. C)There’s no vaccine medicine to prevent AIDS. D)The AIDS virus is not spread by mosquitoes. 27.Concerning the ways the AIDS virus can be passed,which of the following statements is wrong? A)An AIDS mother can pass on the virus to her unborn child. B)The AIDS virus can be passed on through infected blood. C)The AIDS virus can be passed on by shaking hands and sharing belongings. D)The AIDS virus is passed sexually. 28.The expression “a pregnant woman”(Para. 3) means____ . A)a woman who has an unborn child in the body B)a woman who is taking drug C)a woman who has the AIDS virus D)an unmarried mother 29.The fifth paragraph is mainly about____ . A)the results of an AIDS infection B)the possible symptoms of an AIDS infection C)how the AIDS virus is spread D)the diseases AIDS patients easily have 30.When the AIDS virus attacks our defense system____ . A)it starts to destroy our white blood cells B)we begin to feel tired C)it means we will die very soon D)our white blood cells can control it Passage 3 Questions 31 to 35 are based on the following passage. For some time past it has been widely accepted that babies—and other creatures—learn to do things because certain acts lead to “rewards”;and there is no reason to doubt that this is true.But it used also to be widely believed that effective rewards,at least in the early stages,had to be directly related to such basic physiological(生理的) “drives”as thirst or hunger.In other words,a baby would learn if he got food or drink or some sort of physical comfort ,not otherwise. It is now clear that this is not so.Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome