Earth-worms must come out of the earth if it rains a lot, because they can't breathe in their holes full of water. What a dangerous life!(B)1. There are ___ kinds of earthworms in the world. A.800 B. 1,800 C. 1,000,800 D. 1,000 D )2. Why do earthworms like going out...
That's when they come up from their burrows (地洞) to hunt for food. Earth- worms don't like to be in the sun. That's because they breathe through their skin, and they can't breathe if their skin gets too dry. So they try to stay down in the earth while the Sun is out. ...
Earthworm Society of Britain]. In a single hectare (2.47 acres) of land, you may find 500,000 to 2 million individual worms. You may further find that the total wet biomass of all these worms equals 10 times the total weight of all the animals living aboveground on that same plot of l...
Earthworms are useful.Farmers and gardeners like having lots of earthworms in their land because the worms help to make better soil when they dig.That digging keeps the soil loose and airy(通风的).In one year earthworms can pile up as much as 23 000 kg of castings in an area about the ...
Earthworms are very important animals. They help to1. How can earthworms help to make the soil expose the soil to air when they are digging tunnels. At the same time, earthworms make the soil rich with their wastes. Good soil rich?can have as many as 1,000,000 worms per acre! A. ...
V. Choose the best answer and complete the passage(选择最恰当的选项完成短文)Do you know how many kinds of earthworms there are? There are about 1800 kinds in the world!They can be brown, purple and green. They can be as small as 3 cm long and as large as 3 m long.The best time...
Whats more, I think friends are an important part of ones health. Many studies show that people with a wide range of social contacts get sick less than those who dont. I always feel better when I am with friends than when I am alone. When I am with my friends, I always laugh. Laug...
One of the major reasons is that the habitats of many wild animals are polluted or destroyed. At the same time,the food some animals mainly feed on is being scarce,leading to starvation. Besides,a great many wild animals are hunted for food or money each year. ...
killed the worms in the earth cruelly D. had a healthier diet than us53. The new generation show no concern about the ultra-urban pattern just because A. modern agriculture doesn't need hard work B. high profits can be made by selling city land C. they are cut off from nature D. ...
tube worms and other life forms live in these zones. Between the creation and destruction of ocean plates, sediments (沉淀物) collect on the sea floor and provide an archive of Earth's history, the evolution of climate and life that is available nowhere else.(1)Why did the HMS Challenger...