在板式塔塔板中,()的作用是使液体由上一层塔板流到下一层塔板。
A、降液管
B、入口堰
C、出口堰
D、浮阀孔
参考答案:A
His glasses, _____he was like a blind man, were broken.
A.with which
B.with it
C.without which
D.without it
Mike looks _______ than Paul, but they are of the same age. [ ]
A. youngest
B. the youngest
C. younger
D. very young