问题补充:
单选题In ______preparationforthelaunchingofShenzhouⅦ,scientistsneed______knowledgeofweatherchanges.A.the; theB.a; ∕C.∕; aD.the; a
答案:
C解析in preparation for 固定搭配;a knowledge of 某一门知识,这个时候可数。
时间:2019-09-05 12:01:49
单选题In ______preparationforthelaunchingofShenzhouⅦ,scientistsneed______knowledgeofweatherchanges.A.the; theB.a; ∕C.∕; aD.the; a
C解析in preparation for 固定搭配;a knowledge of 某一门知识,这个时候可数。