题目

       左图为2013年我国能源消费结构比重图，右图为2014年我国万元国内生产总值能耗及主要工业产品单位能耗下降百分比情况图。读图，回答下列各题。 20．下列叙述正确的是 A．我国的能源消费结构以油、气为主    B．粗铜综合能耗增幅大于水泥 C．清洁能源比重已超过石油所占比重    D．火力发电标准煤耗下降最小 21．右图所示我国万元国内生产总值能耗变化的主要原因是 A．重工业比重上升       B．服务业的比重下降 C．工业技术的 Students Begin to Smoke at a Younger AgeSHANGHAI---- Almost one in four students aged between 12 and 14 have tried smoking, according to the results of a survey from the CATC(中国抗癌协会).“ Quite a number of boy students in my class smoke outside the school yard during lunch break,” said Li Xiaolan, an English teacher from a high school in Shanghai.The survey also found that 39 percent of students took their first cigarette from their classmates.“ It was quite common to smoke with my classmates at school,”said Zhou Guangrong,a 22- year–old university student from Guiyang, Guizhou province,who started smoking at the age of 12.Most of the student smokers buy cigarettes themselves.” My middle and high schools were surrounded by cigarette shops when I was a student,” said Liu Minghui who used to smoke two cigarettes per day in primary school and two packs per week in middle and high school.“ We’re keen to show that more teenagers are starting smoking much younger than before,and that we need to minimize(降低) the number of young smokers,” said Duan Jiali, an officer in CATC. He added that teachers and parents should set a good example for teenagers by not smoking in front of them at school or at home, which is the best way of stopping teenagers from smoking.1.According to the survey,in a middle school if a class has 40 students, about _____ smoke.A. 5?????? ????????????? ????????????? B. 10? ???? ????????????? ????????????? C. 15??????? ????????????? ?? D. 202.Many boy students smoke ________during lunch break.A. at home????? ????????????? B. in class????? ????????????? C. in the office?????? D. outside the school yard3.The survey found that 39 percent of students took their first cigarette from ________.A. their parents??? B. their teachers???? C. their brothers?????? D. their classmates4.From the passage we know ________smokes two packs per week in middle and high school.A. LI Xiaolan????? ????????????? B. Zhou Guangrong??? ????????????? C. Liu Minghui?????? D. Duan Jiali5.Which of the following is NOT true according to the passage?A．More teenagers are starting smoking much older than before.B．Most of student smokers buy cigarettes themselves.C．Some students smoke in toilets or in corners of the playground after lunch.D．Teachers and parents shouldn’t smoke.