解不等式3x+1≤4x5-x2＞1，并写出它的所有整数解．

接近客户技巧的第一个目标就是先将自己销售出去。

男性患者，7岁。6小时前由载货车上跌下，伤后即有呼吸困难，并逐渐加重。入院查体：脉搏130次／分，血压10.7/6.7kPa，呼吸32次／分，颜面发绀，吸气性呼吸困难，颈、上胸部有皮下气肿，气管向左移位，右侧呼吸音消失，其诊断首先考虑（）。

A.多根多处肋骨骨折

B.血胸

C.血心包

D.开放性气胸

E.张力性气胸

If you are hungry, what will you do? Grab a piece of your favorite meal and stay quiet after that? Just like stomach, even your mind will be hungry. But it never lets you know, because you keep it busy thinking about your dream lover, favorite star and many such absurd things. So it silently begins to hide your needs and never lets itself grow. When mind loses its freedom to grow, creativity gets its full stop. This might be the reason why we all sometimes think “What happens next?”, “Why can’t I think?”, “Why am I always given the difficult problems?” Well, this is the after-effect of using our brain for thinking of not-so-worthy things.

Hunger of the mind can be actually satisfied through extensive reading. But why is it reading but not watching TV? Because reading has been the most educational tool used by us right from the childhood. Just like that to develop other aspects of our life, we have to turn to reading for help. You have a number of books in the world which will answer all your “how-to” questions. Once you read a book, you just don’t run your eyes through the lines, but your mind decodes (译解) it and explains it to you. The interesting part of the book is stored in your mind as a seed. Now this seed is unknowingly used by you in your future to develop new ideas. The same seed, if used many times, can help you link and relate a lot of things, which you would never thought of in your wildest dreams! This is nothing but creativity. The more books you read, the wider your mind will become. Also this improves your oratorical (speech-making) skills to a large extent and also makes a significant contribution to your vocabulary. When you start speaking English or any other language fluently with your friends or other people, you never seem to run out of the right words at the right time.

Actually, I had a problem in speaking English fluently, but as I read, I could improve significantly. So guys, do join me and give food for your thoughts by reading, reading and more reading. Now what are you waiting for? Go, grab a book and let me know!

49. What’s the best title of the passage?

A. Hunger of the mind                           B. Stomach and Mind 

C. Feed your Mind by reading                  D. Reading or Watching TV

50. You don’t know your mind is in hunger because _____.

A. you are not hungry                                   

B. you keep it thinking of silly things 

C. your creativity gets a full stop            

D. you always meet with difficult problems

51. Which of the following is NOT mentioned as the advantage of reading?

A. Reading can make your dream come true.

B. Reading can contribute to your vocabulary.

C. Reading can improve your spoken ability.

D. Reading can make people creative.

52. The purpose of the author in writing this passage is to _______.

A. comment and blame                            B. introduce and describe 

C. explain and persuade                             D. advise and inform

称量时的读数为0.0620g，其有效数字的位数为( )

A．5位
B．4位
C．3位
D．2位
E．1位

某工程网络计划中，工作M的总时差为5天，自由时差为3天；在计划执行情况的检查中，发现只有工作M的实际进度拖后了4天。则关于工作M实际进度的说法，正确的是( )。

A．使总工期拖后1天，使后续工作最早开始时间拖后1天
B．不影响总工期，也不影响后续工作的正常进行
C．使总工期拖后1天，但不影响后续工作的正常进行
D．不影响总工期，但使后续工作最早开始时间拖后1天