It was my sister _____ first had the idea to cycle along the entire Mekong River from _____ it began to where

it ends. [ ]

A. who; which

B. who; where

C. that; which

D. that; what

电阻箱各盘均在零位时，其实际阻值不一定正好为零，这残存的阻值叫做电阻箱的（）。

A、零值电阻

B、零点电阻

C、起始电阻

D、终端电阻