主页
学科
搜索
账户
常见问题
当前学科：熔接工
题目：
单选题
氧气乙炔应保持安全距离不小于（）米。
A
3
B
5
C
10
D
20
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
自体血回输时，积血回收后放置一般不能超过_______。
治疗子肿气滞证，应首选（）
提速道岔连接部分的结构特点有哪些？
圆盘剪常用来纵向剪切钢板的（），也可以将钢板纵向剪切成窄条。
顺序求解法
Learn from Mistakes You can only learn from a mistake after you （1） you’ve made it. As soon as you start blaming other people (or the universe itself) you distance yourself （2）any possible lesson. But if you courageously stand up and honestly say “This is my mistake and I am responsible” the possibilities for learning will move towards you. Admission of a mistake, even if only privately to yourself, makes learning （3）by moving the focus away from blame assignment and towards understanding. This advice （4）counter to the cultural assumptions we have about mistakes and failure, namely that they are （5） things. We’re taught in school, in our families, or at work to feel guilty about failure and to do whatever we can to （6）mistakes. This sense of shame explains why many people give up on their goals: they’re not （7） for the mistakes and failures What’s missing in many people’s beliefs about success is the fact that the more （8）the goal, the more frequent and difficult setbacks will be. The larger your ambitions, the more dependent you will be on your ability to overcome and learn from your mistakes. But for many reasons admitting mistakes is difficult. An implied value in many cultures is that our work represents us: if you fail a test, then you are a （9）. If you make a mistake then you are a mistake. Learning from mistakes requires three things: putting yourself in situations where you can make interesting mistakes; having the self-confidence to admit to them; being （10）about making changes. （1）内应选（） （2）内应选（） （3）内应选（） （4）内应选（） （5）内应选（） （6）内应选（） （7）内应选（） （8）内应选（） （9）内应选（） （10）内应选（）
下列有关经济学常识的表述中，不正确的是：
（）材料可用来做齿轮材料。
唐初名相房玄龄，他虽出身寒门，却通过科举考试，达一人之下，万人之上的高位，为唐的繁荣做出极大贡献。从房玄龄身上，我们可以看出科举制度实现后（）①门第不高的读书人，可以凭真才实学做官②国家和皇帝可以得到治国人才，是最大获益者③使选拔官史的权力集中到中央④促进了当时教育事业和文学艺术的发展
有一段两端固定的碳钢管，安装时环境温度t=5℃，投入运行后管子温度为140℃，求该管由于热膨胀所产生的热应力，（已知碳钢的热膨胀系数χ＝12³10璵/m℃，弹性模量E＝104³10璏Pa）。