一台三相电动机,每相电阻为6Ω,感抗为8Ω,接在线电压为380V的三相电源上,如绕组三角形连接时,其阻抗为()。
A、10Ω
B、15Ω
C、20Ω
D、14Ω
参考答案:A
Though working outside, he is always ________ about his aging mother at home.
A.satisfied
B.concerned
C.particular
D.excited
B737-300型飞机空调系统的最大输出压力()。
A.35psi
B.38psi
C.40psi
D.45psi