如图所示，将盛有铁屑的量筒塞上蓬松的棉花，然后倒置在水中（固体装置已略去）。数天后，他观察到的现象是（ ）
| A．铁屑不生锈，量筒内液面上升 |
| B．铁屑不生锈，量筒内液面不上升 |
| C．铁屑生锈，量筒内液面上升 |
| D．铁屑生锈，量筒内液面不上升 |
相关试题
I_______ the guitar ever since I was 8 years old．（ ）
A．playedB．have played
C．am playingD．will play
After months of looking he_______ found a job． That made him quite happy．（ ）
A．hardlyB．quicklyC．finallyD．sadly
I can't hear you． I_______ to an English speech．（ ）
A．am listeningB．was listening
C．listenD．listened
B．
D．
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