怎样排除离合器打滑的故障？

属于平稳负载的是( )。

A．风机、泵、压缩机、磨粉机等
B．负载长期施加，但大小波动或周期性重复施加
C．短时负载，施加负载时间很短，在负载周期中占比例很小。这类机械通常有较大飞轮力矩，施加负载时，速度略降低，飞轮发出能量做功，电动机功率可适当减小
D．对电气传动装置的要求是有足够的起动和过载转矩、电动机发热校验一般都不成问题

第II卷

第四部分 模块二基础知识（共三节，满分30分）

第一节课文填空（共5小题；每空0.5分，满分 10分）

The ______ of the room was in the fancy ______ popular in those days. It was also a treasure ______ with gold and jewels, which took the country’s best ______ about ten years to make.

Nowadays any country can ______ part if their ______ are good enough. There are over 250 sports and each one has its own _______. Women are not only _______, but play a very important ______ in gymnastics, team sports and …

As a result I _____ changed my shape. As I have grown older I have also grown ______. …But I was always so lonely standing there by myself, _____ in the early 1960s they gave me a family connected by a _____. I was able to _____ my knowledge with others through the World Wide Web.

I’m ______ myself from mosquitoes. When I find a millipede insect, I rub it over my body. It _______ a powerful drug which ______ mosquitoes.

Daisy had always _____ to help ______ species of wildlife. One day she woke up and found a flying carpet by her bed. “Where do you want to go?” it asked. Daisy ______ immediately. “I’d like to see some…”

如图甲所示，体积为200cm³的圆柱体A悬挂在细绳的下端静止时，细绳对物体A的拉力为F₁；如图乙所示，底面积为100cm²的圆台形容器内装有适量的液体，放在水平桌面上，将圆柱体A浸没在圆筒形容器内的液体中静止时，容器内的液面升高了1.5cm，液体对容器底部的压力增加了1.8N，此时细绳对物体A的拉力为F₂，且F₁与F₂之比为3∶2，g取10N/kg。则拉力F₂的大小是           N。

请按要求写出相应的文字表达式，并注明反应类型（化合、分解、氧化）

（1）在氧气中剧烈燃烧，火星四射，生成一种黑色固体______；

（2）在空气中点燃一种暗红色粉末，产生大量白烟______；

（3）用一种白色粉末和一种黑色粉末制取氧气______；

（4）用一种紫黑色固体粉末制取氧气______；

（5）用一种无色液体和一种黑色粉末制取氧气______；

（6）镁条在氧气中燃烧生成氧化镁______；

（7）酒精在空气中燃烧生成二氧化碳和水______；

（8）蜡烛在空气中燃烧______；

（9）过氧化钠和二氧化碳在常温下生成碳酸钠和氧气______．

电子自动平衡式仪表校验哪些项目？