问题 选择题

“低碳”是指在生产和生活中不排放或少排放二氧化碳气体。下列能源的使用最符合“低碳”理念的是………………………………………………………………………(  )

A.煤

B.石油

C.天然气

D.太阳能

答案

答案:D

分析:根据低碳的含义进行分析,并根据煤、石油、天然气燃烧的产物和太阳能无污染的特点判断.

解答:解:A、煤燃烧生成二氧化碳及部分一氧化碳、二氧化硫、烟尘等,不符合“低碳”理念,所以错误.

B、石油燃烧生成二氧化碳及部分一氧化碳、二氧化硫、碳氢化合物、烟尘等,不符合“低碳”理念,所以错误.

C、燃烧生成二氧化碳及部分一氧化碳烟尘等,不符合“低碳”理念,所以错误.

D、太阳能不排放任何污染物,所以正确.

故选D.

点评:在极端天气肆虐的今天,低碳生活理念已成为现代入的共识,节能减排的措施和观念培养便成为化学考查的热点,在学习中要求学生要认真观察生活,体验生活,用低碳生活理念指导自己的活动,把节能减排的措施运用到生产、生活中去,在实践中掌握知识,运用知识

完形填空
完形填空。
  Most adults(成年人) once studied at school,had classes and did their
homework every day.The same    1    is going on at school now.    2   it seems that
doing weekend homework is    3    problem for the modern students.
  All the student should agree that weekend homework should be abolished
(取消).It’s   4     for them studying at school five days a week.With homework to do
on Saturday and Sunday,when can they find    5    to help around the house,go and see
a game,or just have    6    at home? Because of these other activities(活动),the
homework can’t be finished until    7    so their homework is usually done in such a
hurry that on Monday teachers are     8     and often threaten (威胁)to fail whole class
of students because they know nothing about the     9    .If there were no weekend
homework for the students to do ,they would be happy to go to school on Monday 
  10    having a good rest and to learn what the teachers teach.
( )1. A. thing
( )2. A. Also
( )3. A. no
( )4. A. not enough
( )5. A. friends
( )6. A. a rest
( )7. A. Monday afternoon
( )8. A. pleased
( )9. A. lessons
( )10. A. until
B. school
B. But 
B. another
B. enough
B. time
B. an exam
B. Saturday afternoon
B. sorry
B. games    
B. when
C. class
C. Still
C. one
C. no good
C. places
C. a lesson
C. Friday night
C. unhappy
C. interests
C. before
D. homework
D. Though  
D. other 
D. no use 
D. money
D. a picnic 
D. Sunday night
D. not worried
D. activities
D. after
名词解释