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问题 问答题 简答题

清净塔次氯酸钠有效氯及PH值控制范围是多少？为什么？

答案

参考答案：补充次氯酸钠有效氯一般在0.085±0.12%，PH值在7左右。清净塔内次氯酸钠有效氯在0.06%以上为宜.实验证明，当次氯酸钠溶液有效氯在0.05%以下和PH值在8以上时，清净效果明显下降.而当有效氯在0.15%以上时，容易生成氯乙炔有发生爆炸的危险，故从安全和清净效果以及分析有效氯的可能误差来考虑上述最佳控制范围为宜.

多项选择题

下列哪些业务必须经过审批授权后，柜员方可办理（）

A、某单位到我行办理对公结算账户的开户

B、某法院因办案需要，到我行对某一零售客户的存款情况进行查询

C、零售客户来我行购买3万元的基金

D、利息调整
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单项选择题

The "standard of living" of any country means the average person’s share of the goods and services which the country produces. A country’s standard of living, (1) , depends first and (2) on its capacity to produce wealth." Wealth" in this sense is not money, for we do not live on money (3) on things that money can buy. "Goods" such as food and clothing, and "services" such as transport and " (4) ". A country’s capacity to produce wealth depends upon many factors, most of (5) have an effect on one another. Wealth depends (6) a great extent upon a country’s natural resources. Some regions of the world are well supplied with coal and minerals, and have a fertile soil and a (7) climate; other regions possess none of them.

Next to natural resources (8) the ability to turn them to use. China is perhaps as well (9) as the USA in natural resources, but suffered for many years from civil and (10) wars, and (11) this and other reasons was (12) to develop her resources. (13) and stable political conditions, and (14) from foreign invasion, enable a country to develop its natural resources peacefully and steadily, and to produce more wealth than another country equally well (15) by nature but less well ordered.

A country’s standard of living does not only depend upon the wealth that is produced and consumed (16) its own borders, but also upon what is indirectly produced through international trade. (17) , Britain’s wealth in foodstuffs and other agricultural products would be much less if she had to depend only on (18) grown at home. Trade makes it possible for her surplus manufactured goods to be traded abroad for the agricultural products that would (19) be lacking. A country’s wealth is, therefore, much influenced by its manufacturing capacity, (20) that other countries can be found ready to accept its manufactures.

18（）

A.those

B.what

C.that

D.it
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