主页
学科
搜索
账户
常见问题
当前学科：电气工程师发输变电
题目：
单选题
已知地区电网短路容量为150MVA，基准电压为10．5kV，求阻抗的有名值为（）。
A
0.85Ω
B
0.735Ω
C
0.453Ω
D
1.25Ω
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:
（）是当出现危险状态时，强制某些部件或元件联动，以保证安全的设施。
There are three kinds of goals: short-term,medium-range and long-term goals. Short-range goals are those that usually deal with current activities,which we can apply on a daily basis.Such goals can be achieved in a week or less,or two weeks,or possible months.It should be remembered that just as a building is no stronger than its foundation ,out long-term goals cannot amount to very munch without the achievement of solid short-term goals.Upon completing our short-term goals,we should date the occasion and then add new short-term goals that will build on those that have been completed. The intermediate goals bukld on the foundation of the short-range goals.They might deal with just one term of school or the entire school year,or they could even extend for several years.Any time you move a step at a time,you should never allow yourself to become discouraged or overwhelmed. As you complete each step,you will enforce the belief in your ability to grow adn succeed.And as your list of completion dates grow,your motivation and desire will increase. Long-range goals may be related to our dreams of the future. They might cover five years or more. Life is not a static thing.We should never allow a long-term goal to limit us or our course of action. Our long-term goals mean a lot（）. New short-term goals are bulid upon（）. When we complete each step of our goals ,（）. Once our goals are drawn up,（）. It is implied but not stated in the passage that （）.
L4-5椎间盘突出（）
模板按其功能分类，常用的模板主要有（）。
三叉神经痛（）偏头痛（）周期性瘫痪（）帕金森病（）重症肌无力（）
灭火器日常管理有哪些内容和要求？
煤矿“五大灾害”是指：（）、（）、（）、（）、（）。
面神经内含有起自（）
基础设施建设周期较长，因此（）。
男性，56岁。因咽痛验血时发现红细胞呈缗钱样排列，进一步查血沉为100mm／h，IgG29.5g／L，IgA4.2g／L，IgMo.89／L，白蛋白.30g／L，球蛋白50g／L。血红蛋白、肾功能、多骨骼X线摄片及骨髓涂片均正常。本例最可能诊断是（）