题目

的有理化因式可以是 ， ﹣3的有理化因式可以是 ． 答案：【1】a−3 （答案不唯一）【2】a+3 （答案不唯一） the growing speed of a plant is influenced by a number of factors,          are beyond our control. A. most of them      B. most of which     C. most of what      D. most of that