【多选题】工业化道路的问题,主要是指( )的关系。
【单选题】The question set by the teacher was so difficult that the pupils did not know how to it.
【单选题】The question was so difficult that the pupils didn't know how to __it.
【单选题】The question was so difficult that () people could answer it.
【单选题】The question was so unexpected that I was ________for a moment.
【单选题】在生物安全柜内操作需移动多种物品时,应按照( )