单选题：The children were required to wear new school clothes ,but

题目内容：

The children were required to wear new school clothes ,but Kim couldn't afford__________． A．any
B．one
C．some
D．That

参考答案：

答案解析：

Which of the following ways is suggested in making connecti

Which of the following ways is suggested in making connections with the audienc

分类：英语题型：单选题

串联型稳压电路如图2-7-7所示。已知稳压管Dz的稳定电压Uz=6V，负载RL=20Ω。 (1)标出运算放大器A的同相和反相输入端。 (2)试求输出电压uo的

分类：英语题型：单选题

三端稳压器电路如图2-7-13所示，这是一个扩展输出（　　）的电路。 A．电流 B．电压 C．电流和电压 D．以上都不对

分类：英语题型：单选题

分类：英语题型：单选题

在图1-3-28所示的对称Y-Y三相电路中，电压表的读数为1143．16V，Z=(15-j15)Q，Zl-(1+j2)Q。求电路电流表的读数和线电压UAB。图

分类：英语题型：单选题