实验步骤如下：①打开K，缓慢通入干燥N₂一段时间；

②关闭K，加热至一定温度使之反应．

③实验后，观察到C中的溶液不变浑浊，测得各装置质量如下：

问：

下列各项中，没有错别字的一组是(　　)

2017年2月9日，2016年感动中国特别奖授予了中国女排。在里约奥运赛场逆转战胜东道主巴西之前，几乎没有人看好这支中国女排，面对全场嘘声和不可一世的对手，女排姑娘们众志成城，一场场拼，一分分磕，终于力克强敌，时隔12年重夺奥运冠军。对此分析正确的是（    ）

①她们正视了竞争，激发了潜能                              ②她们善于合作，发挥了团队精神

③她们爱国敬业，践行了社会主义核心价值观      ④她们勇于承担了责任，获得了社会赞誉和信任

A

    Mrs. Gill lived next door to Nita. Every afternoon, Mrs. Gill took a walk. She said it kept her young. Nita liked to talk with Mrs. Gill when Mrs. Gill came back. Mrs. Gill was always happy after her walk. She often showed Nita something she had found, like a beautiful red leaf (叶子)

    One afternoon, Mrs. Gill looked upset. Nita asked her why.

    “I am sad about all the trash (垃圾) on the street,” she said. “I never saw so much trash in this neighborhood! What happened?”

    “Mrs. Trent moved,” said Nita. “She used to go out each morning and pick up trash. I often saw her on my way to school.”

    Mrs. Gill looked very    ▲   . “I thought I knew everything about this neighborhood!” she said. “But you see more than I do!”

    “Well, I wish I could do Mrs.Trent's job. But you know, my back (背) often hurts. It's really hard for me to pick things up,” she added.

    “I could do that,” said Nita.

    Mrs. Gill said, “I will carry the trash bag! You can use my gloves (手套) so your hands can stay clean.”

    Nita put on the gloves. She picked up pieces of paper. She picked up boxes. And Mrs. Gill carried the bag. Lots of people stopped to thank Mrs. Gill and Nita. The street looked much better.

    “Thanks, Nita,” said Mrs. Gill. “Let's call ourselves the clean-up team!”

根据材料内容选择最佳答案。