Dr.Jack Todd is very interested in clean water .____,so it's natural that he is to developer of a small and affordable system(系统）to clean wastewater,His “Living Machine" can clean wastewater in your home or in your business.
__61__ The wastewater goes into a big plastic tank where bacteria(细菌）start to break down the waste.A few days later after it is dealt with, the water is brought into a greenhouse filled with plants and fish.With the help of sunlight,the plants and animals remove more chemicals from the water,making it cleaner,Then the water can be reused for washing or bathing __62__ but the water is clean enough for watering the flowing, washing the dog, or even for bathing or swimming.
The advantage of this technology is that it is affordable and good for the environment. __63__. It can help to use less fresh water, and it can help keep the water supply unpolluted.
A. If enough homes and businesses use “Living Machines”
B. People like to plant trees around their houses
C. He is also interested in saving money
D. It cannot be used for drinking or cooking
E. The “Living Machine” is a system for cleaning wastewater
Every year, wildfires(野火) destroy much forest land. homes are broken down, and thousands of people die. smokejumpers are stop helping to stop this.
Smokejumpers are a special kind of firefight. they jump from places into areas that difficult to reach by car or on foot. they race to put out fires as fast as they can.
At a fire site, Smokejumpers first examine the land and decide how to fight the fire. their main goal is to stop fire from spreading. using basic tools such as shovels and axes, smokejumpers clear land of burnable material like plants and other dry material. they carry water with them too, but not much.
Although most smokejumpers are men, more women are joining. Most important are your weight and height. Smokejumpers in the U.S. for example ,must be 54 to 91 kilograms, so they don’t get hurt when they land, or get blown by strong winds.
Smokejumpers must be able to live in the wilderness. in Russia ,many smokejumpers know how to find food in the forest and even make simple furniture from trees.
They work is dangerous, the hours are long. But for these firefighters, smokejumpers isn’t just a job. They love being able to jump out of planes, fight fires, and live in the forest. As 28-year-old Russian smokejumpers Alexi Tishin says,“This is the best job for the strong and brave.”
64. What are Smokejumpers?
65. Where do the jump from?
66. What’s their main goal?
67. Why should they have proper weight?
68. What’s needed to be a smokejumpers?