问题 综合

阅读材料,完成下列问题。

石家庄市是华北地区的大型城市和工业聚集区,冬季大气污染比较严重。下图示意石家庄市城区SO2浓度随高度变化。

(1)结合材料,描述石家庄市上空SO2浓度空间分布特征。

(2)石家庄市冬季SO2浓度高的原因是什么?该日上空1.5千米左右SO2浓度出现极大值可能与什么因素相关?

答案

(1)高度在1.1千米以下,SO2浓度随海拔升高而降低;高度在1.1~1.5千米,SO2浓度随海拔升高而升高;高度在1.5~2.3千米,SO2浓度随海拔升高而降低;高度在2.3千米以上,SO2浓度随海拔升高而升高。

(2)石家庄市冬季气温低,生活供暖加大了对煤炭的需求量,由于能源利用率低,使能源消费中SO2排放增多。上空出现逆温现象,近地面的SO2气体不断在1.5千米处高空集聚,出现SO2浓度极大值。

结合图示信息可得出石家庄市上空SO2浓度空间分布特征;石家庄市冬季SO2浓度高的原因主要与冬季燃煤取暖有关;逆温现象不利于大气污染物扩散,石家庄市上空1.5千米左右SO2浓度出现极大值,最可能是由逆温现象导致。

选择题
阅读理解

阅读理解。

     I really love my job because I enjoy working with small children and like the challenges and

awards from the job. I also think my work is important. There was a time when I thought I

would never have that sort of career(职业).

     I wasn't an excellent student because I didn't do much schoolwork. In my final term I

started thinking what I might do and found I didn't have much to offer. I just accepted that I

wasn't the type to have a career.

I then found myself a job,looking after two little girls. It wasn't too bad at first. But the

problems began when I agreed to live in, so that I would be there if my boss had to go out

for business in the evening. We agreed that if I had to work extra hours one week,she'd

give me time off the next. But unfortunately, it didn't often work out. I was getting extremely

tired and fed up, because I had too many late nights and early mornings with the children.

     One Sunday,I was in the park with the children,and met Megan who used to go to

school with me. I told her about my situation. She suggested that I should do a course

and get a qualification(资格证书)if I wanted to work with children. I didn't think I would

be accepted because I didn't take many exams in school. She persuaded me to phone the

local college and they were really helpful. My experience counted for a lot and I got on

a part-time course. I had to leave my job with the family,and got work helping out at a

kindergarten.

     Now I've got a full-time job there. I shall always be thankful to Megan. I wish I had

known earlier that you could have a career,even if you aren't top ofthe class at school.

1. When staying with the two girls' family,the author ________.

A. was paid for extra work

B. often worked long hours

C. got much help from her boss

D. took a day off every other week

2. Why did the author leave her first job?

A. She found a full-time job.

B. She was fed up with children.

C. She decided to attend a part-time course.

D. She needed a rest after working extra hours.

3. What has the author learned from her own experiences?

A. Less successful students can still have a career.

B. Qualifications are necessary for a career.

C. Hard work makes an excellent student.

D. One must choose the job she like.