(潮湿的)night.That's when they come up from their holes to look for food.Earthworms don't like to be in the sun because they breathe(呼吸)through their skin,and they can't breathe if their skingets too dry.So they try to stay down in theearth while the sun is out.You may have ...
Earthworms breathe (呼吸) through their skin, but they're also able to live for a long time in water. Scientists think that earthworms leave their holes because the rain hits the ground. Francis Sid I've been thinking about starting an earthworm farm. I can make lots of money by ...
Because they breathe through their skin, and theycan't breathe if their skin gets too dry.4. Because they can't breathe in their floodedburrows.5. At night, especially a cool, damp night. 结果一 题目 阅读短文,回答问题。Do you know how many kinds of earthworms(蚯蚓) there are? There ...
Earthworms breathe through their skin since they do not have any lungs or other respiratory system. The size of an earthworm can range from less than half an inch to approximately 10 feet depending upon the species. Their body releases a lubricating fluid which makes moving through the ground ...
The best time to see earthworms is at night, especially a cool,dampnight. That’s when they come up from their holes to look for food. Earthworms don’t like to be in the sun because they breathe (呼吸) through their skin, and they can’t breathe if their skin gets too dry. So ...
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 theearth while the Sun is out. You may notice that if you happen to dig up an earth-worm, it soon burrows back into the earth. Sometimes earthworms don't...
Earthworms are tube-shaped worms with ringlike segments on their bodies. These segments are covered in small bristles called setae that allow them to move and burrow. They have no internal skeleton or exoskeleton. Respiration occurs through their skin, breathing in oxygen and giving off carbon dio...
That’s when they come up from their burrows to hunt for food. Earthworms 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. You may ...
The best time to see earthworms is at night,especially a cool,damp night.That’s when they come up from their burrows(地洞)to hunt for food.Earthworms 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...
food. Earthworms don't like to be in the sun. That's because they breathe 2 their skin, and they can't breathe if their skin gets too dry. Earthworms must come out of the earth if it rains a lot, because they can't breathe in their flooded burrows. What a(an) ...