The couple _____ some money every month for their future use even though their income can only

make ends meet. [ ]

A. put off

B. put up

C. set down

D. set aside

对于不便于工作的狭窄地点，或工作者接触有良好接地的大块金属面时，则宜采用电压为（）V的手提行灯。

A.12

B.24

C.36

D.220