一瓶矿泉水放入冰箱结冰后,下列物理量不发生改变的是( )
A.质量
B.温度
C.内能
D.密度
矿泉水放入冰箱结冰后,温度降低,内能减小,密度变小,体积变大,只有质量是不变的.
故选A.
根据句意,用所给动词的适当形式填空。
小题1:When I saw the parade in Disneyland, I couldn’t stop ___________ (take) photos .
小题2:It takes about three hours ___________ ( fly )to Hong Kong .
小题3:Students should read more books ___________ ( improve ) their writing .
小题4:Sadly, the little dog ___________ (die) for some time .
小题5:You must ___________ (return) these books to the library as soon as possible.
属原络配穴法的是()。
A.公孙、丰隆
B.太冲、光明
C.内关、阳池
D.列缺、合谷
E.神门、支正