A:going
B:goes
C:go
- Are you afraid of__________ out at night?
- No, but I'm afraid __________ the strangers at night.
如图是某物质熔化时温度随时间变化的图象.这种物质是 ____(选填“晶体”或“非晶体”),该物质的熔点是 ____℃,熔化过程中,该物质的内能 ____(选填“不变”、“增加”或“减少”).