证券公司经纪业务内部控制应重点防范规模失控、决策失误、超越授权、变相自营、账外自营、

As we all know, people couldn’t live without water. Some parts of our bodies are made of water. We depend on clean water to live every day.

However, we human beings are polluting water seriously. In some areas of China, people are still in great need of clean water. Dirty water is one of the world’s biggest healthy problems. It’s harmful to our health. When water from the rain and melting(融化) snow runs through roads, it picks up some dangerous chemicals and other things along the way. Many of the rivers are short of protections, so they are easy to be polluted by factories or animals’ waste.

World Water Day has grown to become one of the important dates since 1993. In 2013, World Water Day shares the topic of Water Cooperation. If everyone tries their best to save and protect the clean water, our living conditions will be much better.

根据短文内容，选择正确答案。

小题1:From the first paragraph, we know that people couldn’t live without _________.

A．fire

B．water

C．books

D．language小题2:Dirty water is ________ to our heath.

A．useful

B．kind

C．harmful

D．cruel小题3:Many of the rivers are easy to be polluted by __________.

A．schools

B．factories or animals’ waste

C．fish

D．human beings’ waste小题4:What’s the topic of 2013 World Water Day?

A．Water and Food.

B．City Water Protection.

C．Water Quality.

D．Water Cooperation.小题5:Which of the following is TRUE(对的)?

A．The clean water is enough in China.

B．We needn’t any clean water.

C．World Water Day started in 2013.

D．We should try our best to protect the clean water.

基准收益率作为投资决策者对项目资金时间价值的估价，是投资资金应当获得的（　　 　）盈利率水平。

A．最低

B．最高

C．平均

D．机会

（本题要求写出计算过程）将1.80g不纯的氯化铜样品（杂质不溶于水，也不参加反应）跟一定量的氢氧化钠溶液恰好完全反应，过滤后得到溶质质量分数为20.0%的溶液5.85g．求：

（1）样品中氯化铜的质量分数；

（2）加入氢氧化钠溶液的质量．

团旗和党旗同时悬挂时，党旗应挂在面向的右方，团旗挂在面向的左方。

宜居性原则是什么？