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【单选题】
Research Is a State of Mind For many years there has been much misunderstanding as to just what research is. The popular conception seems to be that there is something mysterious about it, and before any research can be done it is necessary to have expensive scientific apparatus and large, elaborately equipped laboratories. Actually, this is not so. (6) It is a simple, organized way of trying to accomplish something you wish to do—so simple that anyone can do research anywhere at any time. First, you select the problem you would like to solve, then you list at least ten reasons why it has not been solved. (7) It takes just as much effort to solve a useless problem as a useful one. (8) After carefully—and I want to emphasize that word “carefully”—selecting the problem and the ten things between you and the solution, you then use the same procedure as in solving a crossword puzzle.(9)In the solution of the remaining obstacles you may need some simple apparatus, but the things you will probably need most are infinite patience and persistence. Few people realize the difficulties of doing any new thing. Maybe one of the reasons people are so easily discouraged is because of their education. During all our years at school we were examined two or three times a year. If we failed once, we were out. (10)If we are going to make progress, we must learn to fail intelligently so that we won't become discouraged at the 99.9 per cent failure. 9.()
A.
Make sure the game is worth the candle.
B.
That is a step in the right direction, but I don't believe it is enough.
C.
You take the easy obstacles first and by a process of elimination you eventually arrive at the one or two major ones.
D.
But in selecting the problem, you need to be sure to analyze it carefully to see that it is worth the effort.
E.
Research isn't a physical thing at all; it's a state of mind.
F.
By contrast, all research work is 99. 9 per cent failure and, if we succeed once, we are in.
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【判断题】压应力较小时,徐变与应力成正比;混凝土压应力较大时,徐变增长与应力不成正比。混凝土强度等级愈高,胶结力也愈大( )
A.
正确
B.
错误
【简答题】从活性污泥曝气池中取混和液500mL,注入500mL的量筒内,30min后沉淀污泥量为150mL,试求污泥沉降比。若MLSS为3g/L试求污泥指数。根据计算结果,你认为该曝气池的运行是否正常?
【简答题】从活性污泥曝气池中取混合液500ml,注入500ml的量筒内,30min后沉淀污泥量为150ml,试求污泥沉降比。若MLSS为3g/L,试求污泥指数。根据结果计算,你认为该曝气池的运行是否正常?
【简答题】活性污泥曝气池的 MLSS = 3g/L ,混合液在 1000mL 量筒中经 30min 沉淀的污泥容积为 200mL ,计算污泥沉降比,污泥指数、所需的回流比及回流污泥浓度。
【简答题】1 or 3的结果是( )
【判断题】混凝土强度等级愈高,胶结力愈小。
A.
正确
B.
错误
【判断题】我国第一部记事比较详备的编年体历史著述是《春秋左氏传》。( )
A.
正确
B.
错误
【简答题】活性污泥曝气池的 MLSS = 3g/L ,混合液在 1000mL 量筒中经 30min 沉淀的污泥容积为 200mL ,计算污泥沉降比,污泥指数、所需的回流比及回流污泥浓度。
【单选题】移动通信室内覆盖多系统设计的关键问题说法不正确的是( )
A.
无源器件工作频率要涵盖 LTE 、 WCDMA 、 WLAN 、 CDMA 、 GSM 、 DCS 等工作频段。
B.
频段较高的信源采用相对较大的功率
C.
各系统间存在边带杂散噪声、交调噪声等因素将引起相互的干扰
D.
频段较高的信源采用相对较小的功率
【判断题】画作里总是白眼待世,签名似哭之笑之的画家是朱耷
A.
正确
B.
错误
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