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问题 选择题
北宋的沈括在《梦溪笔谈》中写到“登州海中，时有云气，如宫室、台观、城堞、人物、车马、冠盖，历历可见，谓之海市”这里的“海市”实际就是我们所说的海市蜃景，它的成因可以用下列哪个原理解释（   ）

A．光的干涉

B．光的偏振

C．光的全反射

D．光的衍射

答案

答案：C

填空题

根据句意及常识为下列各题选一个节日填空

A. Christmas     B. the Lantern Festival     C. the Mid-Autumn Festival     D. Thanksgiving Day
E. the Dragon Boat Festival     F. National Day     G. Spring Festival     H. Halloween
I. April Fool's Day     J. Teachers' Day
1. At __________, we play a game called "trick or treat". 2. My favourite festival is __________ because I like to eat mooncakes. 3. People will play with different kinds of lanterns of different shapes and eat "Yuanxiao" at __________. 4. __________ is the fourth Thursday of November. It started in 1621 in the USA. 5. __________ is    the most important festival in western countries. It falls on December 25th. 6. __________ is on October 1st in China. Now every year on this day we have seven days off. 7. On __________, some people play tricks on each other. 8. September 10th is __________. On that day teachers can get many best wishes from their students. 9. -What do you eat at __________?

    -We can eat rice dumplings.

10. __________ is the most important traditional festival in China. It usually comes in February.
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单项选择题

男，58岁，心悸、手抖3年，加重1个月。体检：P110次/分，BP160/60mmHg，消瘦，皮肤潮湿，甲状腺可触及，可闻及血管杂音，颈静脉无怒张，心界不大，心率134次/分，律绝对不整，心音强弱不等，肺、腹(-)，下肢不肿。

该病人最可能的病因是( )

A．冠心病

B．老年退行性心脏病

C．扩张性心肌病

D．高血压性心脏病

E．甲亢性心脏病
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