当502胶将自己的皮肤粘合在一起时，可以用（）慢慢溶解。
A、汽油
B、丙酮
C、酒精
参考答案：B
Each girl present at the party was wearing a flower in the hair, which____ their beauty. [ ]
A. added to
B. added up to
C. added up
D. adding to
按照《热水锅炉安全技术监察规程》的规定，为保养锅炉，对备用或停用锅炉应采取哪些措施？
