Could you explain them for me?
问题描述：
Could you explain them for me?
According to the recent research,heavy coffee drinking and heart attack IS not necessarily casue and effect.
1.think about why use it not are.
2.why use necessarily not necessary?
答
because "heavy coffee drinking and heart attack "is a thing,因为它是一件事,咖啡与心脏病这一项研究,其实是指代the recent research这一件事necessarily是ADV,副词,修饰cause and effect necessary 是形容词,...