化简()(-3)÷()等于( )(A)6a (B)-a(C)-9a(D)9a 问题详情：化简()(-3)÷()等于()(A)6a (B)-a(C)-9a(D)9a【回答】C解析:原式=(-3×3)=-9a.故选C.知识点：基本初等函数I题型：选择题...
