Electricity is _ that modern industry cannot develop without it.为什么填 such important energy

Electricity is _ that modern industry cannot develop without it.为什么填 such important energy
Electricity is _ that modern industry cannot develop without it.
为什么填 such important energy

Electricity is _ that modern industry cannot develop without it.为什么填 such important energy
such 修饰名词,so 修饰形容词或副词
而这里important energy 是个名词词组,所以要用such来修饰
电是那么重要现能源,以至于离了它现代工业就不能发展了.

如果你要填so的话，就只能填so important，后面不能有energy，so后面只能由形容词，such后面可以是带有形容词修饰的名词~