A.处于悬浮状态的物体
B.匀速下沉的物体
C.匀速上浮的物体
D.物体沉在容器底,且对容器底部有压力的物体
答案:D
—What's the matter? You don't look very ________ today.
—I have a cold. [ ]
A. good
B. better
C. sad
D. well