| We usually think of pollution as a
harmful waste substance that threatens the air and water. {{U}} (1)
{{/U}}some people have become{{U}} (2) {{/U}}about another kind of
pollution. It can be everywhere, depending on the time of day. {{U}} (3)
{{/U}}it is not thought of as a{{U}} (4) {{/U}}. It is
light. The idea of light pollution has{{U}} (5) {{/U}}with the increase of{{U}} (6) {{/U}}in cities. In many areas, this light makes it{{U}} (7) {{/U}}to observe stars and planets in the night sky. In 1922, the International Dark-Sky Association formed. This organization wants to reduce light pollution in the{{U}} (8) {{/U}}sky. It also{{U}} (9) {{/U}}the effective use of electric lighting. Light pollution is the{{U}} (10) {{/U}}of wasted energy. Bright light that shines into the sky is not being used to provide light{{U}} A. conditions B. necessary C. days D. inquired [单选题](5369)二位四通电磁阀的阀芯在中间位置时,进油腔P与工作腔A相通,工作腔B与回油腔O相通的机能称为( )。
A.O型机能 B.I1型机能 C.Y型机能 D.M型机能 [单选题]—年艾博拉病毒肆虐西非，但广州人对艾博拉病毒却并不关心，也知之甚少；反而经过广州、佛山大范围爆发的登革热，多数广州人对登革热的症状、传播途径、防治方法等都有较深理解。这说明( )。
A.实践是社会生活的本质 B.实践产生了认识的需要 C.实践是检验真理的唯一标准 D.实践是人们在主观意识指导下改造客观世界的活动 [多选题]配电自动化系统电气运行信息包括（ ）。
A.电网运行实时/准实时电压 B.电流量测数据 C.控制信息 D.故障告警信息。 [名词解释]禁烟政策
[判断题]水带铺设的方式主要有垂直铺设、蜿蜒铺设、吊升铺设、消防梯铺设等。
A.正确 B.错误 [单选题]下列不属于道路安全设置的是（）。
A.路基 B.交通标线 C.隔离栅 D.防眩设施 我来回答: 提交
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