考古学家们发掘了数以万计的甲骨片，甲骨上所记的都是占卜语言。凡祭祀、战争、风雨、天象、农业丰歌以及病疫等都是通过占卜向上天请命。这种文字（见图）最早可能出现在（　　）

烧杯中盛有500g冰，全部熔化成水后，发现体积明显减小，则水的质量与冰的质量相比较（不计蒸发）（）

词形转换
There are some ____ at school. (boy)
 Is this ____ classroom? (we)
There are five____ in the room. (child)
 Are there ____ boats in the river? (some)
There are three____ and four __________ in the picture. (man, woman)
Mary, is this ____  bottle of coke? (you)
Daming ____ (be not) in Class Three.
I have two ____ (pencil-box)
Bill is from ____ . (American)
What are____ .(that)
Are you in ____  One? (grade)
There are two ____ on the wall. (picture)
Look! These____ are good. (cake)
Are these ____  apples? (you)
Lingling is from ____ . (Chinese)

—Yes, the early train is to leave at 5:30 a. m.