题目

中华环保世纪行宣传活动主题是“治理水污染、保护水环境”，聚焦工业、城镇污水处理和农村人口饮水安全保障等重点。下列做法违背该主题的是 A．大力宣传新《环保法》等法律法规，推进生态文明建设 B．餐馆洗菜、洗碗水直接排入马路上的雨水窨井 C．实行垃圾分类回收，禁止向河道倾倒垃圾 D．太湖、阳澄湖等湖泊减少围网养殖Many of us believe that a person’s mind becomes less active as he grows older. But this is not true, according to Dr Jarvik, professor of psychiatry at the University of California. She has studied the mental functioning of aging persons for several years. For example, one of her studies concerns 136 pairs of twins (双胞胎), who were first examined when they were already 60 years old. As Dr Jarvik continued the study of the twins into their 70s and 80s, their minds did not generally decline (衰弱) as was expected.　　However, there was some decline in their psycho-motor speed. This means that it took them longer to finish mental tasks than it used to. But when speed was not a factor, they lost very little intellectual (智力的) ability over the years. In general, Dr Jarvik’s studies have shown that there is no decline in knowledge or reasoning ability. This is true not only with those in their 30s and 40s, but with those in their 60s and 70s as well.　　It is true that older people themselves often complain that their memory is not as good as it once was. However, much of what we call “loss of memory” is not that at all. There usually was incomplete learning in the first place. For example, the older person perhaps had trouble hearing, or poor vision, or was trying to learn the new thing at too fast a speed. In the cases where the older person’s mind really seems to get worse, it is not necessarily a sign of decline due to old age. Often it is simply a sign of a sad emotional state. 小题1: This passage is mainly about _______.A．what caused mental declineB．a new discovery about mental declineC．the difference between middle-aged and older personsD．how Dr Jarvik studied mental functioning of the twins小题2:The word “psychiatry” in paragraph 1 most probably means _______.A．the study of diseases of the mindB．the study of physical diseasesC．the study of twins’ growthD．the study of human behavior小题3:More often than not, what we call mental decline is actually a sign of _______.A．a worsening state of healthB．old ageC．nervous tensionD．a state of unhappiness