A:①②
B:①③
C:②④
D:②③
A. I love you, Mum.
B. What colour is it?
C. My favourite colour is green.
D. Thank you to my teachers!
E. What's your favourite song?
下面意思表达最准确、最连贯的一项( )
同学们从山上采集到一种石灰石,他们取80g该样品进行煅烧实验(所含杂质在煅烧过程中不发生变化),反应结束后剩余固体的质量为75.6g.