【多选题】以下说法正确的是( )。
A.
对于星形联结的三相对称负载,中线中没有电流,中线可以省去,可采用三相三线制
B.
不管负载是否对称,中线中都没有电流通过,中线都可以省去
C.
对于不对称的三相负载电路中,中线内有电流通过,中线不能省,只能采用三相四线制
D.
对中线要求联接牢固,且不能在中线上安装开关或熔断器;
【单选题】Terry has been in business for many years preparing accounts to 5 April each year. On 6 July 2018 leased a car with CO2 emissions of 125g. The leasing costs were £400 per month. In the period from 6 J...
【简答题】题目: 11.The City Bank will pa fifty pounds to _____ who helps the police to catch the man. A) someone B) nobody C) anyone D) somebody 题目: 12.When Paul Carson saw the big red American car coming tow...
【简答题】《孙子兵法•九变篇》:“故将有五危:必死,可杀也;必生,可虏也;忿速,可侮也;廉洁,可辱也;爱民,可烦也。”这里的“必死”是什么意思?( )
【单选题】Which is the car that he drives? It’s ________.
【单选题】《孙子兵法•九变篇》:“故将有五危:必死,可杀也;必生,可虏也;忿速,可侮也;廉洁,可辱也;爱民,可烦也。”这里的“必生”是什么意思?()
【单选题】《孙子兵法·九变篇》:「故将有五危:……不可不察也。」下列何者不在「五危」之内?()
【单选题】《孙子兵法•九变篇》:“故将有五危:必死,可杀也;必生,可虏也;忿速,可侮也;廉洁,可辱也;爱民,可烦也。”这里的“必死”是什么意思?
【单选题】The trouble is______I lost my car yesterday.