题干

(1)海水、河水、湖水都是天然水,天然水是____ (填“纯净物”或“混合物”);

(2)“南水北调”工程是我国解决水资源分布不均衡的一个有效途径.为了保护好各引水渠中的水源,下列做法中,不正确的是 ____ (填写序号);

①在引水渠岸边堆放垃圾    ②向引水渠中排放工业废水   ③在引水渠两岸植树    ④向引水渠中倾倒生活污水

(3)资料一:我国部分省市人均水量图

资料二:水资源紧缺指标

紧缺性

轻度缺水

中度缺水

重度缺水

极度缺水

人均水量/(m3/a)

1700~3000

1000~1700

500~1000

<500

上述资料显示,辽宁属于典型的____ 缺水省份.我们每个人都应该节约用水,你在家中可采用的节水办法是____ (写出一条即可).

上一题 下一题 0.0难度 选择题 更新时间:2019-06-22 04:05:57

答案(点此获取答案解析)

混合物,①②④,重度,将用过的生活用水收集起来冲厕所或浇花等

同类题3

根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Do you still remember the haze(雾霾)in the winter? So many people got terribly ill during or after the haze. ____Here is advice for you to protect yourself in hazy weather.

    Spend less time outdoors.This is the most effective way for self-protection in such bad weather.With PM2.5 increasing 103mg per cubic meter,residents will risk a 2.29% increase of death,which experts found out in 2012.If you have to get out,avoid riding bicycles.____

    Close your windows.Experts advice residents to avoid opening windows at home.If you have to ,avoid the time when smog is at its densest(浓的).____Besides,you can keep plants with broad leaves at home to absorb dust,and use air purifiers(清洁器).

    Smoke less.____In hazy weather,smoking would be even more harmful.Smokers are advised to keep their distance from cigarettes before the weather gets better.

    ____For example ,wear special masks outside to avoid breathing in PM2.5.Then take off your coat after getting indoors and keep it away from your other clean clothes,Don't forget to wash your face,rinse(漱)your mouth,and clean your nasal cavity(鼻腔)to clean the particulate matters(颗粒物)that fall on you.Last but not least,keep off stimulating(刺激性)foods.

A.Wear masks.

B.Pay attention to other daily things.

C.Also avoid rush hours,when pollutants will be denser.

D.That's because haze does harm to the health of people.

E.Cigarettes could cause more particulate matters,which are included in PM2.5 .

F.Take more fruits and vegetables instead,which are good for lung,spleen(脾)and kidney(肾).

G.For residents who use air-conditioner,make sure your apartment has enough oxygen indoors.