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某一防冻剂进行检测，所测数据列于下表，计算这一防冻剂的性能指标并回答下述问题。（混凝土一次拌和30L，混凝土容重为2400kg/m3，负温温度为-10℃）

则掺该防冻剂混凝土的负温养护7d的抗压强度比R-7为（）。

A.20%

B.22%

C.24%

D.26%

答案

参考答案：C

单项选择题

请说出在数据封装过程中，至顶向下的协议数据单元（PDU）名字（）

A、数据流、数据段、数据帧、数据包、比特

B、数据流、数据段、数据包、数据帧、比特

C、数据帧、数据流、数据段、数据包、比特

D、比特、数据帧、数据包、数据段、数据流
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单项选择题

When something goes wrong, it can be very satisfying to say," Well, it’s so-and-so’s fault. "or "I know I’m late, but it’s not my fault ; the car broke down. "It is probably not your fault, but once you form the habit of blaming somebody or something else for a bad situation, you are a loser. You have no power and could do nothing that helps change the situation. However, you can have great power over what happens to you if you stop focusing on whom to blame and start focusing on how to remedy the situation. This is the winner’s key to success.

Winners are great at overcoming problems. For example, if you were late because your car broke down, maybe you need to have your car examined more regularly. Or, you might start to carry along with you the useful phone numbers, so you could call for help when in need. For another ex-ample, if your colleague causes you problems on the job for lack of responsibility or ability, find ways of dealing with his irresponsibility or inability rather than simply blame the person. Ask to work with a different person, or don’t rely on the person. You should accept that the person. Ask to work with a different person, or don’t rely on this person. You should accept that the person is not reliable and find creative ways to work successfully regardless of how your colleague fails to do his job well.

This is what being a winner is all about—creatively using your skills and talents so that you are successful no matter what happens. Winners don’t have fewer problems in their lives ; they have just as many difficult situations to face as anybody else. They are just better at seeing those problems as challenges and opportunities to develop their own talents. So, stop focusing on "whose fault it is". Once you are confident about your power over bad situations, problems are just stepping stones for success.

The underlined word remedy in Paragraph 1 is closest in meaning to () .

A. avoid

B. accept

C. improve

D. consider
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