单项选择题：贮罐内外表面有腐蚀现象时，应对有怀疑的部位进行多处（）。A、硬度测定 B、壁厚测定

题目：

贮罐内外表面有腐蚀现象时，应对有怀疑的部位进行多处（）。

A、硬度测定

B、壁厚测定

C、理化检验

D、探伤实验

答案：

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参考答案：解析：外部性指一个经济活动的主体对他所处的经济环境的影响。外部性的影响方向和作用结果具有两面性，可以分为外部经济和外部不经济。那些能够引起社会和其他个人成本增加或导致收益减少的外部性称为...

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War, money and power are a few things that countries and people are concerned about. __1__ I agree that those things are important, I believe that everyone should start to __2__ more on a growing problem-global warming. Global warming will not only __3__ our country and our generation, but also the entire __4__ and future generations. It is __5__ because the weather has been a lot warmer over the past few years, which __6__ the melting(融化) of the ice in the Antarctic. This will soon cause water levels to __7__ and flood parts of the world. Many people ignore this problem because they feel __8__ they can't do anything about it and have more __9__ things to worry about. If we all __10__ so, then our ozone layer (臭氧层) will be __11__ and the planet will no longer be able tomake life continue to exist. We should do our best to limit the use of our planet's __12__ resources(资源) and keep our air clean. __13__, future generations will suffer from our __14__. Some might feel that they can't stop global warming from __15__. But if every single person does his or her part in keeping the air clean, then it will become a __16__ effort. Sure, there are some things that cause pollution and that we won't be able to __17__ change. This may include cars burning oil, but we can __18__ adjust some of these things. People can start carpooling, taking the bus, riding their bikes, or __19__ just walking. If everyone takes __20__ now, I believe we can start seeing remarkable results within a few years.
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