柴油机排气管出口处要装配（）。A.滤清器 B.消音灭火器 C.防爆装置 D.消防器材

一个正方形边长增加3cm，它的面积就增加39cm²，这个正方形边长是（   ）

A．8 cm

B．5 cm

C．6cm

D．10 cm

简述当前学生失范行为的主要表现。

                                                         Make the most of college

Dear Daughter,

     As we drove off from Columbia, I wanted to write a letter to you to tell you all that is on

my mind.

     First, I want to tell you how proud we are. Getting into Columbia is a real testament of

what a great well-rounded student you are. You should be as proud of yourself as we are.

     Your college years will be the most important of your life. It is in college that you will

discover what learning is about. This will be the period where you go from teacher-taught to

master-inspired, after which you must become self-learner. So do take each subject seriously,

and even if what you learn isn't critical for your life, the learning skills you acquire will be

something you will cherish forever.

     Follow your passion in college. Take courses you think you will enjoy. Don't be trapped by

what others think or say, but make up your own mind.

     Most importantly, make friends and be happy. College friends are often the best in life. Pick

a few friends and become really close to them - pick the ones who are genuine to you. Don't

worry about their hobbies, grades, looks or even personalities.

     Start planning early - what would you like to do? Where would you like to live? What would

you like to learn? I think your plan to study fashion is good, and you should decide where you

want to be, and get onto the right courses.

     Whether it is summer-planning, or coursework planning, or picking a major, or managing your

time, you should take control of your life. I will always be there for you, but the time has come for

you to be in the driver's seat - this is your life, and you need to be in control. Being in control feels

great. Try it, and you'll love it!

     College is the four years where you have:

     The greatest amount of free time

     the first chance to be independent

     the most flexibility(灵活性)to change

     the lowest risk for making mistakes

     So please treasure your college years - make the best of your free time, become an independent

thinker in control of your destiny, be bold to experiment, learn and grow through your successes

and challenges.

     May your years at Columbia be the happiest of your life, and may you blossom into just what

you dream to be.

                                                                                                                             Love,

                                                                                                                 Dad (&Mom)

1.What does the author think college life holds in store for his daughter?______

A. Uncertainty

B. Pure enjoyment.

C. Successes and challenges.

D. Experimentation with life.

2. What does the author advise his daughter to do in college?______

A. Plan everything.

B. Party with friends in her free time.

C. Ignore what others think or say.  

D. Treasure and make the best of her college years.

3. Which of these pieces of advice is given in the article?_____

a. think and live independently

b. learn how to learn

c. choose friends with similar personalities

d. be genuine and sincere

e. try new things

A. abc

B. bce

C. cde

D. abe

4. From the text, we can conclude the father ______.

A. is worried about his daughter

B. is strict with his daughter

C. is optimistic (乐观的) about his daughter's future

D. is sad that his daughter is leaving home

工伤保险基金中雇主费率与政府费率的关系为______。

A．等于
B．小于
C．至少等于
D．小于

《国家电网公司电子文件管理办法》规定，电子文件运行的软硬件环境、存储载体等发生变化时，应当及时将其复制。