把4a2+1加上一个单项式可成为一个完全平方式；请写出一个你认为符合条件的单项式

The city of Yangzhou came into being at the Spring and Autumn Period ( about 500 AC ).

As the key transportation link at joint place of the Great Canal（运河）( Beijing-Hangzhou) and Changjiang (Yangtze River), Yangzhou has been from the Sui Dynasty (600 AD.) an economically rich city, and then reached its top in the Tang Dynasty. At that time Yangzhou was a famous port and one of few biggest cities in East Asia.

With the improvement of the local economy and easy transportation way, there happened in the history a special local culture, which has an important place in Chinese culture. Many famous men of letters, poets, artists, scholars(学者), statesmen, scientists and national heroes in the history were born in, lived in or had connection with Yangzhou. Li Bai, one of the greatest Chinese poets visited and stayed in Yangzhou several times in his life and one of his famous poems about Yangzhou has been so popular that Chinese of all ages can sing it and has become a symbol of Yangzhou . Zheng Banqiao, a famous Chinese painting painter in the Qing Dynasty heading a group called “Eight Eccentrics”, had strongly influenced Chinese paintings. Wang Zhong and Yuan Yuan and some other scholars formed school of Yangzhou Scholars and achieved great success in the study of classic Chinese and writing. Zhu Ziqing, one of most famous modern Chinese writers and scholars, had always been proud of himself as a native of Yangzhou and thanked the city for being nourished(养育) by its rich culture. Quite a few other names you may come across frequently in the study of Chinese culture and history have connection with Yangzhou . Yangzhou was so attractive and important that many Chinese emperors in history had come specially to visit or check the city. Emperor Suiyang, who ordered to cut the Great Canal so that he could come more easily and quickly, died on his last trip to the city and buried(埋葬) here. Emperor Qianlong had come all the way from the north and visited the city nine times.

小题1:Which of following sentences is NOT right according to this passage?

A．Yangzhou joined the Great Canal (Beijing-Hangzhou) and Changjiang (Yangtze River).

B．In the Tang Dynasty Yangzhou was a famous port and one of few biggest cities in Asia.

C．Emperor Suiyang was buried in Yangzhou.

D．Emperor Qianlong visited Yangzhou nine times.小题2:We can infer（推断）the poem mentioned in this passage by Li Bai is _______.

A．《赠汪伦》

B．《望庐山瀑布》

C．《静夜思》

D．《黄鹤楼送孟浩然之广陵》小题3:Who influenced Chinese paintings a lot according to this passage?

A．Zheng Banqiao

B．Zhu Ziqing

C．Wang Zhong

D．Li Bai小题4:What’s the best title of the passage?

A．Yangzhou：An Economically Rich City

B．Yangzhou：An Easy Transportation City

C．Yangzhou：A Historical Culture City

D．Yangzhou：A Famous Tour City

下列各句中，没有语病的一句是（   ）

A．如何更好地传承民族文化？有学者提议，应倡导全民重温中华经典，对弘扬民族文化更具积极意义。

B．为了更好地提高服务质量，我们必须坚持以人为本的原则，最大限度地为旅客创造和谐的候车环境、快乐的人性化服务。

C．虽然大家都知道生活离不开物质基础，可也没有一个人不认为，幸福并不完全由物质条件决定。

D．工作压力、环境污染、睡眠不足、缺乏运动等因素都会影响到人的身心健康，不健康的生活习惯、饮食习惯同样不容忽视。

关于公文主题词的解释，下列选项正确的是（）。

A．标识公文的规范化名词或词组

B．标识公文主题的规范化名词或词组

C．标识公文文件类别的规范化名词或词组

D． 标识公文主题、文件类别的规范化名词或词组

发生火灾时，如何逃生？以下说法正确的是（）。

A、跟别人跑

B、要有主见

C、哪边人少就往哪边逃

D、只要从楼上往下跑就行

.浮选过程使用的浮选剂包含捕集剂、调整剂和（）

A.起泡剂

B.消泡剂

C.乳化剂

D.破乳剂