【单选题】According to Paragraph l,the man who does more than is required__________ . 查看材料
A.
is ready to accept what the society offers him
B.
expects nothing in retum for his work
C.
feels that he iS under heavy debt
D.
thinks this makes his life easy
【单选题】Who is this man? He is my father and he ____________. [ ]
【单选题】According to Paragraph l,the man who does more than is required__________ .
A.
is ready to accept what the society offers him
B.
expects nothing in retum for his work
C.
feels that he iS under heavy debt
D.
thinks this makes his life easy
【多选题】直接测量物理量的测量结果,其有效数字与下列哪些因素有关?
【多选题】提高功率因数的目的是()
A.
电路功率因数过低会造成发电机容量不能充分利用
B.
引起输电线路电流过大造成过多的电压和功率损失
C.
提高电力系统功率因数有着重大的经济意义D减少发电量