In the reading room, we found her ________ at a desk, with her attention ________ on a book.

seating; fixing      B. seated; fixed         C. sitting; fixing        D. to sit; fixed

一个圆柱形油桶，从里面量半径是5分米，深l2分米．如果每升油重0.85千克，这个油桶可装油多少千克？