C65/C120断路器自动重合控制附件ATm接线端子及面板上旋钮的含义？

某校一名学生沉溺于网络游戏，一放学就去泡网吧。为了应付老师检查，花钱请人替他做作业。以下是一位学生家长来信的部分内容：“许多父母不是从小就教育孩子艰苦朴素，自力更生，而是对孩子娇生惯养，百依百顺，凡事总是为孩子包办到底，使孩子养成了好逸恶劳、不劳而获的坏习惯，同时还经常给孩子大量的零花钱……”

根据材料，回答以下问题：

（1）请你列举同学当中存在的与家长来信相符的事例。

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（2）请你预测：若照此发展下去，10年之后这名同学的前途和处境将会是一种什么样子？你认为造成这种状况的根本原因是什么？

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用200字以内的篇幅概括所给定材料反映的主要内容。

列举杜威的问题解决五步骤。

Cloud computing is a phrase used to describe a variety of computing concepts that involve a large number of computers (1) through a real-time communication network such as the Internet. In science, cloud computing is a (2)for distributed computing over a network, and means the (3) to run a program or application on many connected computers at the same time. The architecture of a cloud is developed at three layers: infrastructure, platform, and application. The infrastructure layer is built with virtualized compute, storage, and network resources. The platform layer is for general-purpose and repeated usage of the collection of software resources. The application layer is formed with a collection of all needed software modules for SaaS applications. The infrastructure layer serves as the (4)for building the platform layer of the cloud. In turn, the platform layer is a foundation for implementing the (5) layer for SaaS applications.

空白（1）处应选择（）

A.connected

B.implemented

C.optimized

D.virtualized

机械密封、皮碗密封、浮环密封用途各是什么？