问题 问答题 简答题

电极法测定水中氨氮的优缺点。

答案

参考答案:

电极法测氨氮具有通常不需要对水样进行预处理和测量范围宽等优点,但电极的寿命和再现性尚存在一些问题。

阅读理解

Venice(威尼斯) is the "Queen" of the Adriatic Sea(亚得里亚海). Every year thousands of people from all over the world travel to Italy to visit the city. Do you know why they like to go there for a visit?

Venice is a very beautiful city. It is quite different from other cities in the world. There aren't any roads or streets in the city, so there aren't any cars or buses. There are many canals(运河)in the city. There is one big canal and one hundred and seventy-seven small canals. People move up and down the canals in boats to go to work, go shopping or visit their friends.

But Venice is sinking(下沉)It is going down and the water is going up. In 2040 Venice will be under water. The Adriatic Sea will cover (覆盖) the city. The Venetians(威尼斯人) love their city and want to stay there. So they want to save(拯救)Venice form the sea. They do not want to leave. How can they save Venice? They can build some strong huge walls and gates in the sea. The gates will close to keep too much water out. In this way Venice will not sink.

小题1:People from all parts of the world go to visit Venice because________.

A.it is beautiful and quite different from other cities

B.there are a lot of kinds of boats on the canals

C.there are 177 canals in the city

D.it is the most important city in Italy小题2: The Venetians usually go to work or visit their friends________.                                                 

A.by bus

B.in boats

C.in cars

D.on foot小题3: Year by year the Adriatic Sea ________ and Venice________.                                                       

A.is rising; is sinking

B.is going down; is going up

C.is going up; is going up

D.is sinking; is rising

选择题

2009年1月1日我国开始在义务教育阶段实施绩效工资,9月1日开始在医疗卫生领域施绩效工资,2010年1月1日在所有事业单位施绩效工资。据此回答问题

小题1:在事业单位实施绩效工资既要讲求效率,适当拉开收入差距,又要维护公平,防止两极分化,始终兼顾效率与公平。下列关于效率与公平的关系正确的理解有

①效率本身包含着公平,公平本身也包含着效率

②效率的提高有利于维护公平,维护公平有利于效率的提高

③提高了效率就等于维护了公平,维护了公平就等于提高了效率

④无效率即无公平,无公平即无效率

A①②③            B①③④            C①②④          D②③④

小题2:下面是某校实施绩效工资的方案:每人工资的70%归本人,剩余30%拿出来再加上学校拿出一部分作为绩效工资,但这30%部分到年底基本上还是还给了个人。对这一分配方案准确的评述是

A.公平有余效率不足

B.效率有余公平不

C.既兼顾效率又兼顾公平

D.既无效率也无公平小题3:下列属于初次分配中维护收入分配公平的措施是

①提高劳动者的劳动性收入       

②提高劳动者的财产性收入

③提高居民收入在国民收入中的比重            

④扩大社会保障覆盖范围,提高社会保障水平

A①③            B①②            C③④           D②④