— You should be on time tomorrow. There is no______ for being late again.
—OK, I will.
A:excuse
B: need
C:time
台湾省气候温暖湿润,属于 ( )
The first class is .
如图1是“探究物质熔化规律”的实验装置.实验时先将固体物质和温度计分别放入试管内,再将试管放入大烧杯的水中,用酒精灯加热,观察固体的熔化过程 。