691. BK004 塞尺是一种( )。

解析：解析:正确:V型密封圈适用于相对运动速度不高的场合。

https://www.shititong.cn/cha-kan/shiti/917703d9-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析：解析:正确:柴油机大多数采用以压力循环润滑为主、飞溅油雾润滑为辅的综合润滑方式。

https://www.shititong.cn/cha-kan/shiti/9174fa0b-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析：润滑的目的在于用第三种物质（液体、气体、固体等）将两摩擦表面分开，避免两摩擦表面直接接触，减小摩擦和磨损（答案D）。润滑是通过在两摩擦表面之间引入一种介质来减少表面之间的接触，形成润滑膜，从而减少摩擦阻力和磨损。液体、气体、固体等都可以作为润滑剂，起到类似的润滑作用。

https://www.shititong.cn/cha-kan/shiti/dffac004-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析：解析:正确:锉削是一种比较精细的手工加工方式,精度可达0.Ol mm.生产中常常用到。

https://www.shititong.cn/cha-kan/shiti/916e7db7-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析：题目解析 题目：安全生产就是在生产过程中保障( )安全。 选项：A. 人身安全和设备 B. 人身 C. 设备 D. 财产 答案：A 解析：安全生产的核心目标是保障人身安全和设备安全，因为在生产过程中，最重要的是确保员工和操作人员的安全，同时也需要维护设备的完好，以防止意外事故的发生。选项A正确地涵盖了这两个关键方面。

https://www.shititong.cn/cha-kan/shiti/7eed4c91-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

https://www.shititong.cn/cha-kan/shiti/e8e3efce-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析： BF001 内燃机的分类按燃料不同可分为汽油机、柴<|endoftext|> There are several reasons why dogs may engage in excessive licking: Anxiety or stress: Licking can be a soothing behavior for dogs, similar to how humans may comfort themselves by biting their nails or twirling their hair. Dogs may lick excessively when they are feeling anxious, stressed, or nervous. Medical issues: Excessive licking can be a sign of underlying medical issues such as allergies, skin infections, or gastrointestinal problems. If your dog's licking is accompanied by other symptoms such as redness, swelling, hair loss, or a change in appetite, it's important to consult with a veterinarian. Boredom or lack of stimulation: Dogs that are bored or not getting enough mental and physical stimulation may resort to excessive licking as a way to pass the time. Attention-seeking behavior: Some dogs may lick excessively as a way to get attention from their owners. If your dog realizes that licking gets them attention or treats, they may continue to do so. Habit: Dogs are creatures of habit, and they may develop a licking habit if they find it comforting or rewarding in some way. It's important to observe your dog's behavior and consult with a veterinarian if you are concerned about their excessive licking. They can help determine the underlying cause and recommend appropriate treatment.

https://www.shititong.cn/cha-kan/shiti/7ee60ebb-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析： BI009 通常高压油泵的各缸供油油量不均度校验是以( )为准。 A.　额定转速 B.　怠速 C.　常用转速 D.　最高转速 答案:A 解析：高压油泵的各缸供油油量不均度校验是通过在发动机的额定转速下进行的。在额定转速下，发动机运转最为稳定，这时测量各缸供油油量的不均度可以更加准确地判断高压油泵的工作状态。

https://www.shititong.cn/cha-kan/shiti/7eea89ac-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析：BB006 下列不属于齿轮泵的特点的是(D)滤油精度要求高。 解析：齿轮泵的特点包括结构简单、成本较低、工作可靠、使用维修方便和自吸性能好。滤油精度要求高并不是齿轮泵的特点，它通常是与其他组件或系统相关的要求。因此，选项D中的“滤油精度要求高”不属于齿轮泵的特点。

https://www.shititong.cn/cha-kan/shiti/a41d7ec7-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案

解析：解析:正确:在特殊情况下需随同时,应采取可靠的安全措施经领导批准后方可。

https://www.shititong.cn/cha-kan/shiti/e8d95487-f250-11ea-b7fd-00163e0cc5d8.html

点击查看答案