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问题 单项选择题

尿液pH测定最精确的方法是（）

A.指示剂法

B.pH试纸法

C.pH计法

D.滴定法

E.试带法

答案

参考答案：C

解析：pH计法是用pH电极能直接精确地测定出尿液的pH值。故本法精确度较高。

材料题

阅读下列材料，回答相关问题。

材料一 抗战初期，存在许多这样的议论。例如说：“中国武器和技术不如日本，战必败。”……淞沪会战时，有人说：“只要打三个月，国际局势一定变化，英美援助，苏联出兵，战争就可以解决。”……“抗日战争是持久战，这是由中日双方强弱大小，进步退步，多助寡助等敌我之间矛盾着的基本特点决定的”。——毛 * * 选集第二卷《论持久战》

材料二 《星星之火，可以燎原》《关于正确处理人民内部矛盾的问题》《新民主主义论》《反对党内的资产阶级思想》《农业合作化的一场辩论》《论十大关系》。以上6部作品选自《毛 * * 选集》，分别阐述了毛 * * 的新民主主义革命理论、社会主义革命理论、社会主义建设理论。

（1）根据材料一回答抗战中存在哪些论调？这些论调会对抗战产生什么影响？

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（2）请将材料二中的著作与毛 * * 的三个理论对应归类。

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单项选择题

Losing a job or not being able to find one almost always brings unwelcome changes. If you’ve lost a job, the first feeling is often one of shock. On top of the loss of income, many people find the whole routine of their life is shattered, their contact with other people reduced, their ambitions halted and their identity as a worker removed.
There may be good feelings too—it’s nice to be able to lie in bed in the morning, to spend more time with children, or to have more time to think—a better job may be just around the corner. But, unless a better job does turn up, chances are the days start getting longer and the time becomes harder to fill. Many people pass through periods of difficulty in sleeping and eating. They feel irritable and depressed, often isolated and lonely.
Despite all these problems, unemployment can be a chance for a fresh start. You can discover that it provides an opportunity to sort out or rethink what you want from life and how best you can get it. You can use the time to plan how to find a new job, learn a new skill, develop your hobbies, see if you can run your own business, do some voluntary work in your community or meet new people. It’s up to you.

The author’s purpose is to ______.

A．give the basic facts of unemployment

B．explain the reasons of unemployment

C．introduce new jobs to the unemployed

D．offer encouragement to the unemployed
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