题干

 能源和环境问题日益成为人们关注的焦点.

(1)化石燃料包括煤、____和天然气等.过度使用既造成能源危机,又导致环境污染.如燃煤会影响环境,下列环境问题与燃煤有直接关系的是____ (填字母序号,下同);

A.酸雨  B.温室效应  C.可吸入颗粒物增加

(2)2014年冬季北方地区出现大范围雾霾天气,据检测首要污染物为PM2.5.下列关于PM2.5的说法或减少PM2.5措施错误的是____ ;

A.PM2.5是指大气中直径超过2.5μm的颗粒物    B.控制城市汽车保有量

C.PM2.5专用口罩利用了活性炭的吸附性     D.冬季取暖用天然气替代燃煤

(3)目前,我国面临能源消费结构不合理,区域分布不均衡,利用率不高等问题.图1是我国目前与十二五计划能源结构变化的对比图,从图中可以看出,主要调整是____ ;


(4)解决环境问题需要科技进步,如CO2含量不断升高,使全球气候问题日趋严重,科学家认为,人类不仅要努力减少CO2的排放,更重要的是将CO2转化为有用物质.①利用NaOH溶液来“捕捉”CO2,并将CO2储存或利用,流程如图2(部分条件及物质未标出).

下列有关该过程的叙述正确的是____ ;

A.该过程可实现CO2零排放    B.该过程只有1种物质可以循环利用

C.分离室中分离物质的操作是过滤   D.该过程至少发生了4个化学反应

②将CO2转化为化工原料乙烯(C2H4),其反应的微观过程如图3所示:

请写出上述反应的化学方程式 ____

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答案(点此获取答案解析)

\u77f3\u6cb9,ABC,A,\u51cf\u5c11\u7164\u70ad\u7684\u4f7f\u7528\uff0c\u589e\u52a0\u77f3\u6cb9\u548c\u5929\u7136\u6c14\u3001\u5316\u77f3\u80fd\u6e90\u7684\u4f7f\u7528,CD,2CO2+6H

同类题2

根据短文内容,从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    A major source of teen stress is school exams, and test anxiety is not uncommon. When you recognize your teen is under stress, how can parents help your teen stay calm before an exam? Be involved. Parents need to be involved in their teen's work. ____ What they look for is your presence — to talk, to cry, or simply to sit with them quietly. Communicate openly with your teen. Encourage your teen to express her worries and fears, but don't let them focus on those fears.       

    Help them get organized. ____ Together, you and your teen can work out a time—table in which she can study for what she knows will be on the test.       

    Provide a calm setting. Help your teen set up a quiet place to study and protect his privacy. Give them a nutritious diet. It is important for your teen to eat a healthy, balanced diet during exam times to focus and do her best. ____ If this happens, encourage your teen to eat light meals or sandwiches. A healthy diet, rather than junk food, is best for reducing stress.        

    ____ Persuade y our teenager to get some sleep or do something active when she needs a real break from studying. Making time for relaxation, fun, and exercise are all important in reducing stress. Help your teen balance her time so that she will feel comfortable taking time out from studying to spend time with friends or rest.       

    Show a positive attitude. ____Your panic, anxiety and blame contribute to your teen's pressure. Make your teen feel accepted and valued for her efforts. Most importantly, reassure your teen that things will be all right, no matter what the results are.       

A. A parent's attitude will dictate their teen's emotions.     

B. Exam stress can make some teens lose their appetite.     

C. They will only make the situation worse.       

D. Encourage your teen to relax.       

E. The best thing is simply to listen.       

F. Help your teen think about what she has to study and plan accordingly.    

G. Your teen may also make negative comments about themselves