幼儿品德与社会性发展评价量表中，自我系统的内容包括：（）。A、自信心 B、独立性 C、坚

在“驾苍龙，载青旂，衣青衣，服青玉”中，“服”之义为（）

A.食饮

B.衣服

C.穿着

D.佩戴

压入式局部通风机和启动装置，必须安设在距离掘进巷道回风口不小于（）m的进风流中。

A、30

B、20

C、5

D、10

一般室内膨胀珍珠岩保温砂浆抹灰，底子灰的配合比为______石灰膨胀珍珠岩灰浆。

A．1:4

B．1:3

C．1:2

D．1:5

Dear friends,
Water is essential for human health and well being. Water also helps to reduce poverty. Without water, there would be no life on this planet. Although water covers about two-thirds of the Earth’s surface, only 2.5% of the world’s water is drinkable.
Many millions of people around the world face water shortages. Many millions of children die every year from water-borne diseases. And drought regularly afflicts some of the world’s poorest countries. The world needs to respond much better. We need to increase water efficiency, especially in agriculture. We need to free women and girls from the daily chore of carrying water, often over great distances. We must involve them in decision-making on water management.
We need to make sanitation a priority. This is where progress is needed most. And we must show that water resources need not be a source of conflict. Instead, they can call for cooperation. Significant gains have been made. But a major effort is still required. That is why this year marks the beginning of the "Water for Life" Decade. Our goal is to meet the internationally agreed targets for water and sanitation by 2015, and to build the foundation for further progress in the years beyond.
This is an urgent matter of human development, and human dignity. Together, we can provide safe, clean water to all the world’ s people. The world’s water resources are our lifeline for survival, and for sustainable development in the 21st century. Together, we must manage them better.
Thank you.

用电信息采集系统主要采集方式有哪些？