—Is the flower beautiful?

—Yes, at _____ it's _____ the one you bought for me. [ ]

A. last; as bad as

B. least; no better than

C. last; not better

D. least; no worse than

为保证加热炉供油量和油压的平稳，需设专用（）。

A、油箱

B、供油泵

C、管线

D、火嘴