井下有害气体中H2S的气味是（）。A、微酸 B、无味 C、坏鸡蛋味

You are             young to go.[ ]

A. two                      

B. too                      

C. to

阅读理解。

     Do you know why I am always in support of learning a foreign language? The reasons are as follows:

1. Improve your English

    I know this might not make sense at first but hear me out. As a person who speaks only one

language, you have no basis for comparison（比较）；all you know is English. In different languages

the same idea is often expressed in different ways. You will find yourself speaking and writing more

creative sentences. There is a reason why most great writers and poets are students of many

languages.2.______________

     Travelling is one of the great joys of life and also one of the most wonderful experience. Why not

get the most out of your experience? If you don't know the native language of the country that you are

visiting, you are completely excluded from the culture. The locals（当地人）don't speak to you.

Knowing even a few phrases will make a huge difference. You will meet more people and find it much

easier to get around.

3. Join the global community

     The majority of the world does not speak English. The truth is that new thoughts and ideas are

happening everywhere and they are not being immediately translated. The world is getting smaller and

we are coming into contact(接触) with more non-English speakers all the time. Gain an advantage

for yourself in business and personal relationships by being able to communicate with people in their

language.

     Now that you know three great reasons for learning a foreign language, do it right now.

1. According to the author,______.

A. it is necessary for writers and poets to learn many languages

B. knowing another language will make you able to write a novel

C. studying another language will help you make your native language better

D. if you only know one language, you have no ability to appreciate the language

2. The underlined word“excluded”in the third paragraph probably means______.

A. shut out    

B. joined in    

C. sent for    

D. put up

3. Which of the following can be used to fill in the blank in the passage?

A. Help enrich your life

B. Help you to become rich

C. Help widen your knowledge

D. Increase your travel experiences

4. What is the best title for the passage?

A. Three Great Reasons for Learning a Foreign Language

B. A Foreign Language Help You Gain Respect

C. Improve Your English by Comparison

D. Build Confidence Through Learning a Foreign Language

速度不但有大小，而且有方向，这种既有大小又有方向的量叫矢量。

胸椎正位标准片所见，错误的是

A．上部胸椎及第七颈椎，或下部胸椎及第一腰椎，于照片正中显示

B．棘突序列于椎体正中

C． 两侧横突对称显示

D．椎弓根不能对称显示

E．各椎体椎间隙清晰锐利，椎骨纹理显示明了

什么叫导击，什么叫绝缘体，什么叫半导体，什么叫绝缘老化？