How do you think
senior high school will be different from junior high school?What do you think
the principal will talk about in his speech?这是高中英语新教材译林版必修1第1单元的两个句子(p2)。为什么一个用how,一个用what呢?
During the Petrochemical PTA
plant upgrade, the production capacity was expanded from 225 Kt/a to 400 Kt/a while achieving a 32% reduction in overall
energy consumption.这句话应该没有语法错误,但是这个while achieving的逻辑主语是哪个呢?