采用润滑脂润滑的滚动轴承，一般应根据轴承转速的由高到低，在装配后轴承空腔内注入相当空腔容积约（）的符合规定的清洁润滑脂，低速可以适当取上限，高速取下限。
A.2/3～1/3
B.100%～80%
C.20%～10%
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APP具体操作流程为：
下列地点中，气温年较差最大的是[ ]
A．南极中心站
B．哈尔滨
C．广州
D．海口
| 完形填空。 | ||||
| Outside our hotel in Ho Chi Minh City, Vietnam, an old woman waited beside door with her hand outstretched. Every day I put my hand in hers as our eyes met. She never failed to 1 smile, my grasp, and my greeting. On the last day of our visit, I found myself 2 on a busy corner across the street from our hotel. Bicycles and motorbikes rushed in front of me. We had been advised to walk 3 through the crowded traffic without looking right or left. Let them 4 us. 5 tonight I was by myself and felt uncertain to 6 the flood of vehicles. As I 7 on the roadside. I felt a hand on my elbow and looked 8 to see the smile of my small beggar friend looking up at me. She nodded her head toward the street 9 that she would take me across. Together, we moved slowly into the disorder. When we 10 the corner of the crossing, I looked down at her again, and couldn't help saying, "You have the most beautiful smile in the world." She 11 knew little English, but must have 12 the tone, for she threw both arms around me in a big hug while the 13 streamed by us on both sides. Then we 14 moved on toward the sidewalk, where she pulled my face down to hers, kissed me on both cheeks, and then walked away, 15 smiling and waving back to me. I had not given her a single 16 . But we had 17 something much more important-a warming of hearts in friendship. This 18 reminded me of something Mother Teresa once said, "If you cannot do great things, you can do small things with great 19 ." I will always remember this 20 . | ||||
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统计工作的四个基本步骤为（）
A.设计、搜集资料、整理资料和分析资料
B.设计、搜集资料、统计描述和统计推断
C.设计、整理资料、分析资料和表达资料
D.搜集资料、整理资料、统计描述和统计推断
E.搜集资料、整理资料、分析资料和表达资料
什么叫刮板造型？什么样的铸件可采用刮板造型？
某市标准化行政主管部门制定并发布的工业产品的安全、卫生要求的标准，在其行政区域内是___( )___。
A．强制性标准
B．推荐性标准
C．自愿性标准
D．指导性标准