题目

(1997年上海，二、3)如图12-3所示，一金属直杆MN两端接有导线，悬挂于线圈上方，MN与线圈轴线均处于竖直平面内，为使MN垂直纸面向外运动，可以 (A)将a、c端接在电源正极，b、d端接在电源负极(B)将b、d端接在电源正极，a、c端接在电源负极(C)将a、d端接在电源正极，b、c端接在电源负极(D)将a、c端接在交流电源的一端，b、d接在交流电源的另一端图12-3阅读理解Fangfang, a 15-year-old Chinese girl, likes eating snacks very much. She prefers cream biscuits, McDonald’s food, KFC, and Beijing roast duck. Sometimes she eats two packages of biscuits a day. As a result, she becomesoverweight.Today in China, there are many children like Fangfang. They like snacks. They don’t eat enough healthy foods like vegetables and fruit. It’s very bad for their health. Poor eating habits are a serious problem. Health experts say that children should have healthy eating habits. First, they must eat regular meals and begin with a good breakfast. Second, they should have different kinds of foods, such as fruit, vegetables, grain, eggs, milk and meat and so on. Third, the children shouldn’t eat too many snacks and fried foods. They are delicious, but eating too much of them is unhealthy. If children do as the experts say, they won’t become fat. They will be healthier. Students won’t become tired at school, and they will have enough energy to study well.1.What does the underlined word “overweight” mean?A.聪明的 B.懒惰的 C.超重的 D.痴呆的2.Fangfang becomes overweight, because _____.A.she is an American girl B.she has a balanced dietC.she likes eating snacks D.she likes vegetables soup3.What kind of food is good for your health?A.Fast food. B.Snacks. C.Fried food. D.Vegetables and fruit.4.If students do as the experts say, they will ______.A.become fatter and fatter B.become more and more beautifulC.have enough energy to study D.be healthier and more tired5.Which of the following is True?A.Eating snacks is good for your health.B.Fangfang doesn’t like Beijng roast duck.C.Fangfang comes from America.D.Students shouldn’t eat too much fried food.