根据电网安全稳定运行的需要，（）及以上水轮发电机组应配置电力

搜题请搜索小程序“爱下问搜题”

问题单项选择题

根据电网安全稳定运行的需要，（）及以上水轮发电机组应配置电力系统安全稳定器（PSS），以改善系统阻尼特性。

A.50MW

B.100MW

C.150MW

D.100MW

答案

参考答案：A

改错题

短文改错。

　　It is interesting to visit foreign country,but there 1.________

are some problems if we know the language very well. 2.________

It may be difficulty to talk with the people there. 3.________

We may don't know how to use the telephone there. 4.________

We may not know how to buy things we needs. 5.________

In a strange country,we may not know where to

be eat or what to order in a restaurant.　　　　　　　　 6.________

When we need help,we may not know how to ask help. 7.________

It was not a happy thing to have an experience like that. 8.________

单项选择题

以下运输方式中，在空间和时间方面具有充分的自由性，可以实现“门对门”运输的是()

A、公路运输

B、铁路运输

C、水路运输

D、航空运输