题目

下列组合中都属于自养型生物的是（ ）A. 小麦和青霉 B. 小麦和硝化细菌C. 乳酸菌和青霉 D. 乳酸菌和硝化细菌 答案：【答案】B【解析】本题考查生物的代谢类型，要求考生明确同化作用的类型有自养型和异养型两大类，自养型生物能进行光合作用或化能合成作用，否则为异养型生物。自养型生物是指能将环境中的二氧化碳和水转化为生物体内的有机物、同时储存能量的生物，包括光合作用型和化能合成作用型两大类 Since the first Earth Day in 1970, Americans have gotten a lot “greener” toward the environment. “We didn’t know at that time that there even was an environment, especially we didn’t know that there was a problem with it,” says Bruce Anderson, president of Earth Day USA.But what began as nothing important in public affairs (公共事件) has grown into a social movement. Business people, political leaders, university professors, and especially millions of grass-roots (草根) Americans are taking part in the movement. “The understanding has increased many, many times,” says Gaylord Nelson, the former governor from Wisconsin, who thought up the first Earth Day.According to US government reports, emissions from cars and trucks have dropped from 10.3 million tons a year to 5.5 million tons. The number of cities producing CO beyond the standard has been reduced (减少) from 40 to 9. Although serious problems still remain and need to be dealt with, the world is a safer and healthier place. A kind of “green thinking” has become part of practices.Great improvement has been achieved. In 1988 there were only 600 recycling programs; today in 1995 there are about 6,600. Advanced lights, motors, and building designs have helped save a lot of energy and therefore prevented pollution.Twenty-five years ago, there were hardly any education programs for environment. Today, it’s hard to find a public school, university, or law school that does not have such a kind of program. “Until we do that, nothing else will change!” says Bruce Anderson.【1】According to Anderson, before 1970. Americans had little idea about ________.A.the social movementB.recycling techniquesC.environmental problemsD.the importance of Earth Day【2】Where does the support for environmental protection mainly come from?A.The business men.B.Common people.C.Government officials.D.University professors.【3】What have Americans achieved in environmental protection?A.They have cut car emissions to the lowest.B.They have solved their environmental problems.C.They have lowered their CO levels in forty cities.D.They have reduced pollution by taking active actions.【4】What does the underlined word “emissions” mean in the passage?A.热量B.尾气C.燃油D.污染【5】What is especially important for environmental protection according to the last paragraph?A.Education.B.Planning.C.Green living.D.Green thinking.