【单选题】三相电路中已知三相对称负载以三角形连接,已知负载相电流 A ,则火线电流应为?
【单选题】Which of the following question is addressed in paragraph 3 of the passage?
A.
How long are lichens able to live?
B.
How do lichens reproduce?
C.
How might algae benefit from the relationship with the fungus?
D.
How did the relationship between algae and fungus develop?
【单选题】人与人的合作不是简单的相加。假定每个人的能力都是1,那么10个人合作的结果有时比10大,有时甚至比1小。一个人敷衍了事,两个人相互推诿,三个人永无宁日,这种教训是十分深刻的。对这一现象认识错误的是__。( )
B.
如果每个人不尽自己的责任,结果只能是一事无成
C.
社会分工有所不同,每个人都应该尽到自己的责任
D.
责任是相互的,如果都不尽责,受害的是我们自己
【单选题】一三相对称负载,三角形连接,已知:相电流IBC=10∠-10°安,则线电流I=( )安。
【简答题】三相对称负载三角形连接,已知相电流 A,则三个 线电流是多少?
【单选题】一三相对称负载,三角形连接,已知:相电流IBC=10∠-10°安。则线电流I=( )。
【单选题】Which of the following is the best title of this passage?
A.
How to Keep Balance Between Population and Environment
B.
How to Control Population Effectively
C.
How to Educate People on Birth Control
D.
How to Improve the Poor People's Lives
【单选题】三相对称负载,三角形连接 , 已知相电流
【单选题】Which of the following does the author NOT suggest as an important area for research?
A.
How precipitation affects water levels.
B.
How to prevent outbreaks of infectious diseases.
C.
How urban development affects the environment.
D.
How the industrial pollution impacts the environment.