计算题：计算1m³二砖厚砖墙标准砖和砂浆的净用量及总消耗量，耗损率为1%。
题型：问答题 简答题
问题：
计算题：计算1m³二砖厚砖墙标准砖和砂浆的净用量及总消耗量，耗损率为1%。
题型：问答题 简答题
Bottled water has become the choice for people who are healthy and thirsty. Bottled water is all over the world. But some say the planet’s health, and people’s health may be suffering from it.
The idea that bottled water is safer for humans may not be true. The Natural Resources Defense Council of America said, “There is no promise that because water comes out of a bottle, it is cleaner or safer than water from the tap.” Another New York City-based action group added that some bottled water is “really just tap water in a bottle—sometimes more clean, sometimes not.”
It is not proven that bottled water is better than tap water. Nick Reeves from the Chartered Institution of Water and Environmental Management said, “The high mineral content (含量) of some bottled water makes them not good for feeding babies and young children.” Also, most bottled water doesn’t have fluoride (氟化物), which can make teeth stronger. Kids are drinking more bottled water and less fluoridated tap water, and some say that’s behind the recent rise in bad teeth.
Storing is another problem. Placed near heat, the plastic bottles can produce bad chemicals (化学物质) into the water.
According to the Environmental Protection Agency, some 2.7 million tons of plastic are used worldwide to bottle water each year. The plastic can take between 400 and 1,000 years to break down.
In terms of energy use, plastic bottles are also not cheap. One report said that if water and soft drink bottlers had used 10 percent recycled materials in their plastic bottles, they would have saved about 72 million gallons of gas.
So, if you are worried about the effect of bottled water on the Earth, you can take the following steps.
● Drink from your tap. Unless your government warns against this, it should be fine.
● Get a container (容器). Carry your tap water in a steel or a lined drinking container, and clean it between uses.
● Keep it cool. Don’t drink from a bottle that has been sitting in the sun, don’t store it near chemicals, and don’t reuse plastic bottles.
● Choose glass containers over plastic if possible. When finished, recycle!
小题1:What is the main idea of the article?
A．Drinking tap water is the only choice for people.
B．Glass containers are better than plastic bottles.
C．Plastic bottles are harmful to the environment.
D．Bottled water may not be as good as we think.小题2:What can we learn about plastic bottles from the article?
A．They break down in less than 300 years.
B．They can be used for many other things.
C．They are a risk to the environment.
D．They are cheap to make.小题3:According to the article, we can know that bottled water is __________.
A．no problem for the environment
B．more expensive than tap water
C．always safer than tap water
D．better for babies小题4:Which of the following about tap water is NOT mentioned in the article?
A．There are a lot of problems storing tap water.
B．Bottled water can be just tap water in a bottle.
C．It may be better for your teeth.
D．It may contain fluoride.