We often see ants looking for new homes and returning with other ants if they’ve found a good one. Ants do this by teaching. And a team of scientists have developed small robots to study how ants teach one another. The robots can behave like rock ants. They use one-to-one teaching — an ant discovers a better home and teaches the route (路线) to another.
In their research, the scientists replaced the teaching ant with a small robot. They circled an area with two homes for the ants. One was their old home, and the other was a new, better home built for them. The researchers waited for an ant to leave its old home and put the robot directly ahead of it.
Then the robot moved towards the new, better home. During its journey, the robot stopped from time to time to wait for the follower ant. The ant needed to look around and get familiar with things around it. When the robot led the follower ant to the new home, the ant examined the new home in its own time and began its way back home. The robot had successfully taught the route to the pupil ant.
A key part of the teaching is tandem (纵排的) running. One ant leads another slowly along a route to the new-found home. The pupil ant memorizes the route so that it can find its way back home by itself and then lead another ant to the new home, and the process repeats.
【小题1】What’s the role of the small robot in the study?A.A student. | B.A teacher. | C.A researcher. | D.An engineer. |
A.steps in building a home for ants. | B.preparations for the teaching process |
C.locations of the small robot and the ant | D.differences between the two homes for ants |
A.it ran too fast |
B.it went the wrong way |
C.the follower ant returned to its old home |
D.the follower ant needed time to remember the route |
A.Some ants can learn from humans. | B.Ants usually look for new homes together. |
C.Things around may help an ant find its way | D.Repeating can help an ant improve its memory. |
A.Using robots to study ants’ teaching process. | B.Passing knowledge to ants in an easy way. |
C.How rock ants look for a new home. | D.How rock ants know their way. |
Animals all need food to live. Some animals only eat vegetables and plants, while others eat meat.
A food chain(食物链) shows us what different animals eat. For example, some snakes catch (捕捉) and eat birds or take eggs from their nests. Birds eat insects(昆虫) and spiders(蜘蛛) because birds can see them from far away and fly down to catch them. Spiders often catch butterflies and flying insects in their webs.
The butterfly is below(在……下面) all the other animals in the food chain because it doesn’t eat any other animals. The snake is at the top of the chain above the others. )
Sometimes animals in the food chain become extinct. This is bad for the food chain. Because some animals don’t have enough food to eat. So all the different animals are important in the food chain.
【小题1】The writer organizes(组织) Paragraph 2 by ________.A.asking questions | B.giving examples | C.telling stories | D.making a report |
A.Because they eat a little. |
B.Because many animals feed on them. |
C.Because they are too small. |
D.Because they don’t eat any other animals. |
a. butterflies b. spiders c. snakes d. birds
A.c﹣b﹣a﹣d | B.a﹣d﹣b﹣c | C.c﹣d﹣b﹣a | D.c﹣a﹣d﹣b |
A.Nature. | B.Science. | C.Arts. | D.Food. |
Bill is a two-month-old elephant. He is very happy today because many people take photos with him. He feels like a star. He wants to live with people. So, he runs out of the zoo at night. He goes to a supermarket first. All the people run out of the supermarket after they see Bill. Bill finds people don’t like him out of the zoo. He is a little sad (难过的). But he still has a good time in the supermarket. He eats some bananas. They’re delicious. He drinks milk, too.
After that, Bill goes out of the supermarket. Then he hears someone shouting in a house, “Help! Save my son!” So, Bill runs to the house. He sees a room in the house is on fire (着火). He wants to help but he can’t find water. Then he sees a swimming pool behind the house. He uses his nose to get water and sprays (喷洒) to the room. Bill does this many times. At last, he saves the boy in that room.
根据材料内容选择最佳答案。
【小题1】Where does Bill go first after he gets out of the zoo?
A.Kitchen. | B.Supermarket. |
C.Park. | D.The boy’s home. |
A.Because he saves the boy. |
B.Because he lives with many people. |
C.Because many animals like him very much. |
D.Because many people take photos with him. |
A.they want to go home | B.they are afraid of Bill |
C.they want to buy food | D.their houses are on fire |
A.How Bill saves the boy. | B.Where Bill goes at first. |
C.How Bill runs out of the zoo. | D.Where Bill sprays the water. |
A.Excuse me. | B.Help me! |
C.Thank you! | D.You’re welcome! |
I have two pets. They are Wangwang, a dog, and Huahua, a cat.
Wangwang is brown and grey. He is naughty(淘气的). He sometimes steals(偷) food in the kitchen. Once, when there was nobody at home, Wangwang pulled (拉) a piece of meat off the table. But he was not careful enough . The plate also fell to the floor. When I got home, I saw the broken plate all over the floor, so I became very angry. Wangwang was so afraid that he went back to his bed in the garden at once.
Huahua is a white and yellow cat. She is not beautiful but she is very lovely. Every night at weekends, Huahua sleeps on my bed. When she sleeps, she always snores. It is very funny.
Huahua is also naughty. Whenever she does something bad and my grandma tries to catch her, she runs away quickly and hides quietly under the bed.
Wangwang and Huahua love to play games with me and I like them very much.
【小题1】How many pets does the writer have?A.One. | B.Two. | C.Three. | D.Four. |
A.He pulled a plate to the floor. | B.He ate a fish. |
C.He pulled a piece of meat to my bed . | D.He ate a big piece of meat. |
A.White and brown. | B.Brown and grey. | C.White and grey. | D.White and yellow. |
A.呼吸 | B.打鼾 | C.跳跃 | D.摇头 |
A.Huahua is a cat. | B.Huahua is very naughty. |
C.Wangwang sleeps on the writer’s bed every night. | D.Wangwang and Huahua love to play games with the writer. |
组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网