题目

完形填空（共20小题；每小题1.5分，满分30分） 阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。 Red roses were her favorites, her name was also Rose. And every year her husband sent them, tied with pretty bows. The year he died, the roses were still  16  to her door. Each year he sent her roses, and the  17  would always say, “I love you even more this year, than last year on this day.” My love for you will always 18  , with every passing year. “She kn氢元素有3种不同的原子，其原子核内的中子数依次为0、1、2．这3种原子与金属锂形成的氢化锂“三兄弟”--LiH、LiD、LiT是“神舟七号”的燃料．下列说法正确的是（　　）A．H、D、T质子数之比为1：2：3B．LiH、LiD、LiT相对分子质量依次增大C．H、D、T核外电子数不等D．LiH、LiD、LiT中Li元素质量分数相等