Male frogs use territorial calls to warn off frogs that are entering their territory. 1.. So they do not waste energy by making territorial calls when they detect those frogs near their territory. However, if an unknown frog approaches the land they claim as their own, males will aggressively let out a territorial call.2..
Warning calls are employed to warn other frogs of some nearby danger and are commonly heard when an attacker comes near.3.. If an attacker attacks a frog, the frog will make a call almost like a scream, which is intended to scare the attacker. This scream is almost always made when the attacker succeeds in grasping the frog because, should it be greatly surprised, the attacker may release the frog, which might permit the animal to make its escape.
4., which is employed when another frog is caught hold of by mistake. This regularly happens during the mating season, when male frogs eager for a mate wrongly grasp another male. In other cases, females that have already mated may make this call when different male frogs catch them.5..Whenever a male catches a female of another species, the female gives the release call to inform the male that he has made a mistake and should let go.
A.Frog calls further differ between species
B.The final major call made by frogs is the release call
C.To the human ear, frog mating calls may all sound similar
D.Frogs make short, sharp, loud sounds while they hurry away
E.Males can recognize the calls their neighbors make from afar
F.If the strange frog does not leave immediately, it may be attacked
G.There are some special occasions when frogs belonging to different species mix with one another
高三英语七选五中等难度题
Male frogs use territorial calls to warn off frogs that are entering their territory. 1.. So they do not waste energy by making territorial calls when they detect those frogs near their territory. However, if an unknown frog approaches the land they claim as their own, males will aggressively let out a territorial call.2..
Warning calls are employed to warn other frogs of some nearby danger and are commonly heard when an attacker comes near.3.. If an attacker attacks a frog, the frog will make a call almost like a scream, which is intended to scare the attacker. This scream is almost always made when the attacker succeeds in grasping the frog because, should it be greatly surprised, the attacker may release the frog, which might permit the animal to make its escape.
4., which is employed when another frog is caught hold of by mistake. This regularly happens during the mating season, when male frogs eager for a mate wrongly grasp another male. In other cases, females that have already mated may make this call when different male frogs catch them.5..Whenever a male catches a female of another species, the female gives the release call to inform the male that he has made a mistake and should let go.
A.Frog calls further differ between species
B.The final major call made by frogs is the release call
C.To the human ear, frog mating calls may all sound similar
D.Frogs make short, sharp, loud sounds while they hurry away
E.Males can recognize the calls their neighbors make from afar
F.If the strange frog does not leave immediately, it may be attacked
G.There are some special occasions when frogs belonging to different species mix with one another
高三英语七选五中等难度题查看答案及解析
A new phone app uses shaking from smartphones to warn people about earthquakes. The new app is called MyShake, which is the work of four researchers at the University of California. Berkeley.
Smartphones are equipped with accelerometers(加速器). MyShake uses phone accelerometers to measure seismic (地震的) activity. It has been programmed to know the difference between normal activity and earthquake movement. The software developers say their app is right 93 percent of the time. A smartphone sends seismic information to the app developers. If the developers receive several warnings from one area, it recognizes that an earthquake may be taking place or will take place soon. Using information sent from the app, the network then judges the location and strength of the quake in real time. MyShake can record 5.0 earthquake at distances of 10 kilometers or less.
MyShake uses very little power, according to its developers. Only when seismic activity is sensed by the app does it become active and sends data to the network. The app works best when your phone is resting on a flat surface, like a table.
The developers hope that MyShake can add to information collected by the U.S Geological Survey. That U.S agency has created the Earthquake Early Warning System, also known as the EEW. The EEW has used sensors for measuring quakes in many areas. In places where no such equipment exists, MyShake may be the only method of early quake detection (发现). The app also shows ways to stay safer during an earthquake. The developers say it will become more effective as more people use it.
The developers say they hope to add a feature that will warn people about possible tsunami after an earthquake.
1.The new app
A. is a kind of accelerometer.
B. feels earthquakes through smartphones.
C. is developed by the U.S Geological Survey.
D. predicts possible tsunami after an earthquake.
2.What is the second paragraph mainly talking about?
A. How MyShake works.
B. What seismic activity is.
C. Why MyShake is developed.
D. When accelerometers record earthquake.
3.We can infer that MyShake
A. docs not work when the spartphone is in the pocket
B. sleeps while there is no shaking of the earth’s surface.
C. guides people how to survive when many people use it at the same time.
D. recognizes an earthquake when it receive the information from other sensors.
4.The new app developers hope to
A. use the information by the U.S Geological Survey to better MyShake.
B. unite the U.S Geological Survey to combine the EEW and MyShake.
C. help the EEW detect earthquakes somewhere.
D. improve the EEW.
高三英语阅读理解中等难度题查看答案及解析
Experts warn that 70% of cosmetics are manufactured using palm oil, a substance which is and has caused a lot of arguments.
A.controversial B.delicate C.dynamic D.objective
高三英语单项填空中等难度题查看答案及解析
Study Links Video Game Use to Problems in School
A new study warns that too much time spent playing computer games could affect a child’s performance at school. 1. They show that too many hours spent playing games can reduce students changes of success in school.
More than 600 teenagers between the ages of 14 and 16 took part in research project.2. It is said to be the first ever long-term study of information technology on school test results in Northern Ireland.
The study found that teenagers who played computer games less than once a week were more successful in school than those who played them twice a day or more. 41% of the students who used gaming devices two or more times a day received passing grades on school exams.3..
The study found that social media use did not affect school performance. Celine McStravick is the director of the National Children’s Bureau Northern Ireland (NCBNI). She says “4.— I think that’s more because social media is part of every child’s life. It’s the way they communicate. It’s the way they keep in touch with their friends.”
Many parents say their children are becoming increasingly dependent on computer games. Some have compared gaming to a drug addiction.5. It suggested that computer games can cause children to stay awake late at night. Less sleep makes children tired and unable to pay attention in school the next day.
A. However, the study did not explore addiction.
B. The new games are much different from older ones.
C. The study showed no connection between social media and test results.
D. It took place over a period of three years from 2013 to 2015.
E. Thai compared with 77% of those who rarely played the games.
F. Drug addiction does great harm to their health and performance at school.
G. Britain’s National Children’s Bureau Northern Ireland reported the results of the study.
高三英语七选五中等难度题查看答案及解析
Hybrid cars, also called hybrid electric vehicles （HEVs）, are cars that use more than one source of energy to run. They differ from the majority of cars on the road today in several ways. The main difference is that HEVs run on gasoline and electricity. An HEV car has a battery-powered motor as well as an engine that runs on gasoline.
A hybrid car is a bit more expensive to produce than a regular car even though its engine is smaller. The reason for the greater expense is that the engine is more complex. It has specialized mechanisms that allow it to operate using gasoline and electric power. It also contains a computer that works differently from those of regular cars. Even though it is more expensive to purchase, it costs less to own than gas-powered cars. When an HEV car is at a stoplight or going at a speed below 15 miles per hour, its special computer tells it to run just on electric power. When the computer senses that the car needs more power, it puts the gasoline engine back to work. The computer is constantly deciding whether the car will use electricity, gas, or a combination of the two.
Because the HEV has electric power to help it run, it uses much less fuel than most cars. In fact hybrid cars are the most fuel-efficient cars that exist today. They can get from 50 to 60 miles per gallon on average. The high mileage saves money for the car owner and conserves precious supplies of petroleum. Hybrid cars help the environment in other ways too. For example, when
the HEV is using electric power, it does not send out poisonous smoke that pollute the air.
Despite the differences between hybrid cars and regular cars, HEVs offer the same feel as regular cars. They handle the same way and speed up and stop in the same way too. HEVs, though, are generally smaller than gasoline-powered cars. Their rounded, aerodynamic frame helps add to their fuel efficiency but unfortunately does not add to the amount of space inside the vehicle.
1.Which statement best explains the characteristics of an HEV?
A.Safe and reliable. B.Expensive but long-lasting.
C.Smaller engine, greater power. D.High price, low carbon.
2.The transformation between the gasoline and electricity in an HEV is operated by ________.
A.the engine B.the battery
C.the computer D.the driver
3.For what purpose was the HEV invented?
A.To save energy. B.To provide better service.
C.To lower the expense of purchase. D.To give the drivers a different feeling.
4.Where does the passage probably come from?
A.A health report. B.A science magazine.
C.A vehicle advertisement. D.A travel journal.
高三英语阅读理解中等难度题查看答案及解析
Mary used to listen to music that________the 0ld times.
A．called for B．called on C．called up D．called in
高三英语单项填空中等难度题查看答案及解析
Some experts are warning that the step the US government has taken to deal with the current crisis between China and Japan is ______ of much risk.
A．one B．those C．that D．ones
高三英语单项填空中等难度题查看答案及解析
It used to be mostly the army that used small, unpiloted aircraft, called “drones”. The little planes were very costly. But as they have dropped in price more people have begun to use them.
The fast rate of development of computer technology, image sensing equipment, satellite navigation and smart phones has led to lower-priced drones. Researchers and developers have learned how to build smaller and less costly drones. Nowadays, moviemakers are using drones to film from the sky. Historians use them when they explore ancient buildings. Rescue workers use them to look for people. And now farmers are also using them to watch over their crops.
Romain Faroux is a French businessman, whose father was a farmer. He believed drones could help farmers. He has helped create a company which has developed a small drone that could be controlled by people on the ground. It’s called “Agridrone”. It uses a special sensor to examine crops. The technology used on the drone is similar to that used on a smartphone -- except it has wings. A computer program directs the drone to fly over the crops. The sensor on the drone records four different-colored “bands” of sunlight that are reflected off the crops.
Jean-Baptiste Bruggeman is another farmer in France who is using a drone. He says the drone flies over his crops at different times of the season and provides a lot of information about his crops. The pictures taken by the drone show him the exact amount of fertilizer the crops need. It also shows exactly where the fertilizer is needed.
Romain Faroux says farmers use information provided by the Agridrone to place fertilizer only in areas where it is needed. This saves money and reduces pollution. Before they used the drones, farmers would put the same amount of fertilizer everywhere. Drones also save time because farmers can examine up to three hectares (英亩) in about a minute.
1.Why do rescue workers and farmers begin to use drones?
A.Because they are affordable now.
B.Because their sizes have become smaller.
C.Because they can save people a lot of time.
D.Because the technology has been developed.
2.What is the sensor on the drone mainly used for?
A.Helping the sunlight shine on the crops.
B.Directing the wings to fly over the crops.
C.Examining the different colors of the crops.
D.Recording the sunlight “bands” reflected off the crops.
3.What does the underlined word “it” in paragraph 3 probably refer to?
A.A smartphone. B.A sensor.
C.A drone. D.A band.
4.What is the main idea of the text?
A.Crops will be harvested by drones soon.
B.Drones will be widely used in different fields.
C.French farmers use drones to examine their crops.
D.Farmers develop special drones for their crops.
高三英语阅读理解中等难度题查看答案及解析
I need to call my friend David _____ coat I walked off by mistake yesterday.
A. in whose B. in that C. with which D. with her
高三英语单项填空中等难度题查看答案及解析
I need to call my friend David _________ coat I walked off by mistake yesterday.
A．in whose B．in that C．with which D．with her
高三英语单项填空中等难度题查看答案及解析