题目

He is very strong. He _______ lift the heavy box.A. can B. need C. must D. have to 答案：【答案】A【解析】试题分析：句意：他非常强壮。他能搬起来那个沉的盒子。can能，可以；need需要；must必须；have to不得不；根据He is very strong.可知他身体强壮，故能搬起很重的盒子，故选A。（2013•天津一模）函数y=sin(2x+π3)+sin2x在区间（0，π）上零点的个数为（　　）A．0B．lC．2D．3