题目

选词并用其适当形式填空 sellthinkwoman brothershesell （1） My mother drinks milk every day. Sheit's good for her health. （2） like buying different kinds ofclothes. （3） Come and buy your clothes at ourgreat. （4） The blue sweater is mine. is red. （5） My birthday is coming. I want to buya gift for him. 答案：【1】thinks 【1】Women 【1】sale 【1】Hers 【1】brother's已知（3ax+1）（x+b）dx=0，a，b∈R，则a•b的取值范围为（ ）A．B．∪（1，+∞）C．a•b∈（-∞，]∪[1，+∞）D．（1，+∞）