ten - three =____

Do you have a baseball bat?

  Yes，____ ____．

阅读下面流沙河的《就是那一只蟋蟀》中的片段完成下列问题。
                                                                                   就是那一只蟋蟀
                                                                                   就是那一只蟋蟀
                                                                                   在海峡那边唱歌
                                                                                   在海峡这边唱歌
                                                                                   在台北的一条巷子里唱歌
                                                                                   在四川的一个乡村里唱歌
                                                                                   在每个中国人所到之处
                                                                                   处处唱歌
                                                                                   比最单调的乐曲更单调
                                                                                   比最和谐的音响更谐和
                                                                                   凝成水
                                                                                   是露珠
                                                                                   燃成光
                                                                                   是萤火
                                                                                   变成鸟
                                                                                   是鹧鸪
                                                                                   啼叫在乡愁者的心窝
                                                                                   就是那一只蟋蟀
                                                                                   在你的窗外唱歌
                                                                                   在我的窗外唱歌
                                                                                   你的倾听
                                                                                   你的想念
                                                                                   我在倾听
                                                                                   我在吟哦
                                                                                   你该猜到我在吟些什么
                                                                                   我会猜到你在想些什么
                                                                                   中国人有中国人的心态
                                                                                   中国人有中国人的耳朵

中国首部《反家庭暴力法》于2016年3月1日起施行。该法规定，当事人因遭受家庭暴力或者面临家庭暴力的现实危险，可向人民法院申请人身安全保护令。保护令包括禁止被申请人实施家庭暴力，禁止被申请人骚扰、跟踪、接触申请人，责令被申请人迁出申请人住所等措施。确立人身安全保护令制度，意在（  ）

①将反家暴工作从事后惩治变成事前预防    ②依法维护平等和睦文明的家庭关系

③依法追究实施家庭暴力者的刑事责任      ④立法保护妇女和儿童的合法权益

小明的质量是50kg，他爸爸的质量是70kg，他俩一起从教学楼的一楼同时走上二楼，在此过程中（　　）