A：蒸发和沸腾在任何温度下都能发生
B：烧水时在壶口上分看到的“白气”是水蒸气
C：衣柜了的樟脑丸逐渐减少是汽化现象
D：霜的形成是凝华现象，放出热量
Mike
saw a film
John
cleaned the room
Wu Yifan
had a cold
Chen Jie
read a book
Zhang Peng
went fishing
-Do you usually _______ the bus to work every day?
-No, _______ I go there by car.
太阳能电池板材料除单晶硅外，还有铜、铟、镓、硒等化学物质．
