—What did he want to know,Anne?

—_______I could finish writing the report.[ ]

A.When it was that

B. It was when that

C. It was when

D. When was it that

下列哪个不是减小电源电阻的方法

A．使用容量充分的电源变压器
B．将电源变压器安装在影像科附近
C．使用截面积足够的铜质电源线
D．使用截面积较小的铜质电源线
E．尽量缩短电源线的长度