【名词&注释】
相对原子质量(relative atomic mass)、化学变化(chemical change)
[单选题]可能用到的相对原子质量:H 1 C 12 0 16 Na 23 Mg 24 Al 27 Cl 35.51.(2009?重庆)下列变化中属于化学变化的是( )
A. 木柴劈成块
B. 西瓜榨成汁
C. 残雪化成水
D. 高粱酿成酒
查看答案&解析查看所有试题
学习资料:
[单选题]23.________,so the Egyptians invented balls instead.
A. Throwing stones was a popular game for children
B. Stones were.too heavy to throw
C. Stones might hurt children
D. They didn’t have so many stones
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