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【简答题】
听对话，选择正确的答案。 1．What does the girl's brother think of the watch? [ ] A．He doesn't mind it. B．He likes it. C．He can't stand it. 2．Where was the boy yesterday evening? [ ] A．He was at home with his family. B．He was at theatre with his family. C．He was in a restaurant with his family. 3．What does the girl think of soap operas? [ ] A．She doesn't mind them. B．She likes them. C．She can't stand them. 4．What will the girl do? [ ] A．She will play volleyball. B．She will go back home. C．She will walk with her dog. 5．What is the truth about Tom? [ ] A．He is smart. B．He has brown hair. C．He iS funny.
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【多选题】根据《机械设备安装工程施工及验收通用规范》，下列关于地脚螺栓、垫铁和灌浆的说法中正确的有（）。
A.
安装地脚螺栓前应对预留孔内的杂物等进行清除，对地脚螺栓表面油法和氧化皮等进行清除，对螺纹部分应涂大量油脂和螺栓保护套
B.
地脚螺栓的类型、数量、直径、规格尺寸根据随机文件规定进行核查无误后方可进行地脚螺栓的安装
C.
预留地脚螺栓孔的螺栓的安装，其预留孔中的混凝土必须达到设计强度的60%以上方可拧紧螺栓
D.
根据设计文件或设备随机技术文件规定对施工单位申报的垫铁材料证明资料进行复查，包括垫铁材质、数量、种类进行复查，准确无误后允许进行安装
E.
预留孔灌浆前，灌浆处应清洗洁净；灌浆宜采用细碎石混凝土，其强度应比基础或地坪的混凝土强度高一级；灌浆时应捣实，并不应使地脚螺栓倾斜和影响设备的安装精度
【单选题】对于带电的孤立导体球 ( )
A.
导体内的场强与电势大小均为零
B.
导体内的场强为零，而电势为恒量
C.
导体内的电势比导体表面高。 导体内的电势与导体表面的电势高低无法确定。
D.
导体内的电势与导体表面的电势高低无法确定。
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