烟中所含烟碱等有毒物质通过对神经系统的影响而使（ ） A．血管收缩，血流缓慢 B
题型：选择题
问题：
烟中所含烟碱等有毒物质通过对神经系统的影响而使（ ）
A．血管收缩，血流缓慢
B．血管收缩，血流加快
C．血管舒张，血流缓慢
D．血管舒张，血流加快
题型：选择题
Section C
Directions: Read the following text and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need.
A．The factors leading to a good speaker
B．The importance of enunciation
C．Talk with strangers
D．Pronunciation, the other important assistant in conversationE. A famous master of conversation
F. The great use of dictionary
1. _________________________
The ancient Greeks were very good at making conversations, and the greatest talker of them all was philosophers Socrates. His student Plato surpassed some of his supposed conversations, and we read them in The Dialogue of Plato. In many classrooms today, Socrates’ method of teaching is used.
2. _________________________
The best talkers appear to have had a great interest in and love for their follow creatures, a curiosity about the world in general, some powers of observation and tolerance for those of others
, and quick thinking. And they talk for the fun of it, not to show off their knowledge.
3. _________________________
A good voice must have the help of good speech, whose two assistants are clear enunciation and correct pronunciation. Poor enunciation may suggest to your listeners that you lack consideration, and that you are not especially concerned about their opinion of you.
4. _________________________
Pronunciation is settled by common agreement of the community of group speaking the particular language or dialect. For standard pronunciations of words, a dictionary is your best friend.
5. _________________________
Think of meeting a stranger as a chance to have a good time to talk, to make a friend. Look with a smile directly into the other’s eyes when you are introduced, and shake hands with a firm, friendly clasp (紧握). This will give you confidence. Then try to have a smooth and pleasant conversation with him.