—What was Jim wearing at the party?
—Nothing _______. He was in his usual shirt and jeans.
A:special
B:simple
C:important
D:interesting
下图反映的历史事件是( )
在实验室里,将一支温度计从20℃酒精中取出,放在温度为22℃的环境中,温度计的示数变化情况是( )
某化学兴趣小组用如图装置验证一氧化碳还原氧化铜,并探究其还原产物的组成.