入户光缆在室内（建筑物以内）环境下，宜选用（）光缆。A、普通蝶形引入光缆 B、管道蝶

一个等腰三角形的顶角是底角的2倍，则它的各个内角的度数是（    ）。

关于股指期货的套期保值交易，下列说法正确的有（）。

A.目的是规避股票指数波动导致的风险

B.尽管保值交易是厌恶风险、拒绝投机的交易行为，但实质上投资者何时进行保值仍具有投机的属性

C.与股市相关的避险工具目前只有股指期货

D.一般而言，应该选择与股票资产高度相关的指数期货作为对冲标的

Nanjing is the capital city of Jiangsu Province(省). It is about 1,200 kilometres(公里) from Beijing, 300 kilometres from Shanghai. With a population(人口) of about 5,180,000, it covers an area about 6,598 kilometres.

Nanjing has a long history over 2,460 years. It has mountains(山), rivers, lakes, old walls and forests(森林). There are many interesting places to visit. For example, if you want to have a look at the whole city, you can go to the Yuejiang Tower. If you want to know the history of Nanjing, you can go to the Ming tomb, the Zhonghua Gate, the Rain Flower Terrace and so on. If you want to watch maple leaves(红叶) in autumn, please go to the Qixia Mountain. You will enjoy the beauty（美丽）of Nanjing if you visit Xuanwu Lake. It is very comfortable to walk around the Zhongshan Mausoleum. The Hongshan Zoo is a good place for children because there are many kinds of animals there. Many visitors come to the Confucius Temple to taste the delicious food and walk around the busy street.

If you come to visit Nanjing next time, you are here in the right place. Always welcome you to our city.

小题1:What’s the capital of Jiangsu Province?（请用1个词回答。）                       

小题2:How long is the history of Nanjing? （请用3个词回答。）                        

小题3: How many interesting places in Nanjing are mentioned(被提到) in the passage? （请用不超过3个词回答。）                                                         

小题4:Where can we go if you want to have some delicious food? （请用3个词回答。）

小题5:Why is the Hongshan Zoo a good place for the children? （请用不超过7个词回答。）

脑垂体反射区位于双足趾趾腹全部。( )

什么是非鞣质，它在鞣液中起何作用？