not as difficult as science和什么相等

not as difficult as science和什么相等 Geography is not as difficult as Science as difficult as和as easy as ? not as.as和not so.as有什么不同? I didn't do as well in math as in science.和I learnt math not not as as等于什么 as difficult English is not as ______(difficult)as chinese Lesson One is not as difficult as Lesson Two. Lesson 1 is not as difficult as Lesson 2 not so ---as和not as----as有什么曲别? not as.as.和not so.as.as.as.和so.as.的区别