All flights ___________ because of fog. I’m afraid you will have to stay here for another day.
A. had been put off B. called off
C. have been called off D. have put off
高一英语单项填空简单题
All flights ___________ because of fog. I’m afraid you will have to stay here for another day.
A. had been put off B. called off
C. have been called off D. have put off
高一英语单项填空简单题查看答案及解析
Determination is the most important of all the ____________ because without determination, you will end up doing nothing.
A.tactics B.virtues C.emotions
高一英语单项填空中等难度题查看答案及解析
If you are afraid of the dark,it’s not a big deal.It’s perfectly normal to feel afraid After all,animals do too. “Fear matters,”says Karen Warkentin,an ecologist.“It’s a good thing,” she adds, “because fear makes you do things that keep you alive.”
Like kids,many animals experience fear and they respond to the feeling in variety of ways.A frightened turtle pulls its head and legs inside its shell.A small fish will swim away when a big,hungry fish approaches.
Some animals respond to fear in ways you might not expect.The first example is that the fear of being eaten can scare some frogs right out of their eggs. Warkentin made the surprising discovery while studying red—eyed tree frogs in Costa Rica.
In this species,female frogs attach jellylike clumps(果冻一样的块状物)of their eggs to the undersides of leaves.The leaves hang on branches that dangle(悬挂)over ponds.After they hatch from the eggs,the tadpoles(蝌蚪)then fall into the water,where they eventually grow into adult frogs.
Tree frog eggs usually grow for 6 days before hatching.If they sense that a hungry snake is about to attack,however,they can hatch up to 2 days ahead of schedule. As the snakes are unable to swim,by falling into the water early,the tadpoles can escape.
If hatching early helps protect red—eyed tree frogs from snakes,you might wonder why their eggs don’t always hatch sooner.It turns out that hatching early brings its own danger.Once tadpoles land in the water,hungry fish and other animals like to eat them too.Staying in their eggs for a full 6 days,then,allows frog embryos(胚胎)to grow big and strong.This extra growth improves their chances of surviving in the water.
1.It can be inferred from the passage that fears .
A. help animals grow bigger and stronger
B. are less common among young animals
C. help animals move a lot to fit the environment
D. are more or less important in order for animals to survive
2.We are told in the passage that tree frogs .
A. face danger both inside their eggs and in the water
B. will grow fast if they fall into the water later
C. are surprisingly clever when inside their eggs
D. stay in their eggs longer if they are frightened
3.Why do the tadpoles hatch up to 2 days ahead of the schedule?Because
A. They like falling into the water early
B. They want to grow into adult frog
C. They sense a hungry snake is about to attack
D. Frog embryos can grow strong
4.What is the best title of the passage ?
A. What is Fear B. Why do we feel afraid
C. You feel afraid,animals do too D. Fear is a good thing
5.What do you think would be discussed in the following paragraph?
A. Further explanations as to why tree frogs hatch ahead of schedule.
B. How the unborn frogs know when a snake is about to attack them.
C. Another example of animals that responds to fear in an unexpected way.
D. How tree frogs improve their chances of survival before falling into the water.
高一英语阅读理解中等难度题查看答案及解析
---I’m afraid to ask questions because of my poor ____
---You’d better practice speaking more.
A. instruction B. pronunciation
C. introduction D. construction
高一英语单项填空简单题查看答案及解析
All networks like 3G and 4G will be things of the past, because 5G will be reachable in the near future. So, what’s so special about a 5G future? First of all, its download speed can be as fast as 20GB/s, which is 100 to 200 times that of 4G. But what’s more impressive is 5G’s low delay rate. Now, 4G takes an average of 200 milliseconds(毫秒) to send and receive information. But 5G will get it down to 1 millisecond.
5G is a great breakthrough. It’s going to change the way equipment connects to the Internet, and more importantly, to each other. And self-driving cars may be one of the biggest breakthroughs to come out of 5G. Human reaction time is 200 milliseconds, yet we still have accidents every day. The self-driving car under a 5G network could react and communicate its reaction to hundreds of cars around it, all within 1 millisecond. It’ll play a great role in preventing car accidents and ending traffic jams completely.
5G can benefit us in many other ways.Operations could be performed by robots controlled by experts from the other side of the world. Therefore, more lives will be saved in time. Factories can be staffed by robots that can communicate their tasks to each other, and they can do more work efficiently over a 5G network. Imagine a group of drones(无人机) flying over a field of crops, using sensors(传感器) on the ground to sort, pick, feed, and water plants all on their own. Then farmers won’t have to work so hard anymore.
However, 5G is not perfect. One major disadvantage has to do with why it’s so fast. 5G uses the millimeter waves, while 4G uses the 15 to 40 centimeter-long waves. And shorter waves go fast but not very far.On 4G networks, the signal can go 10 kilometers. But the 5G signal can go at most 300 meters, and it can’t even go through walls or rain. So, what does that mean? Having such a short signal distance means we need to build a lot of transmitters(信号发射塔) in the future.
1.How does the author show us 5G’s advantages in Paragraph 1?
A.By giving examples of the uses of 5G.
B.By making comparisons between 4G and 5G.
C.By explaining the scientific principles of 5G.
D.By analyzing 5G’s development from 4G.
2.According to the author, the self-driving cars will ________.
A.cause more car accidents
B.slow down 5G’s development
C.run without being connected to the Internet
D.have a much faster reaction speed than humans
3.What does the underlined part “be staffed by robots” in Paragraph 3 mean?
A.Be built by robots.
B.Have robots as workers.
C.Offer employees home robots.
D.Produce more medical robots.
4.What does the last paragraph mainly talk about?
A.The main weakness of 5G networks.
B.How to make 4G networks more perfect.
C.The types of long waves and short waves.
D.How to improve the signal of mobile phones.
高一英语阅读理解中等难度题查看答案及解析
All networks like 3G and 4G will be things of the past, because 5G will be reachable in the near future. So, what’s so special about a 5G future? First, its download speed can be as fast as 20GB/s, which is 100 to 200 times that of 4G. But what’s more impressive is 5G’s low delay rate. Now 4G takes 200 milliseconds to send and receive information. But 5G will get it down to 1 millisecond.
5G is going to change the way equipment connects to the Internet. And self-driving cars may be one of the biggest breakthroughs to come out of 5G. The self-driving car under 5G network could react to hundreds of cars around it within 1 millisecond. It’ll prevent car accidents and end traffic jams completely.
5G can benefit us in other ways. Operations could be performed by robots controlled by experts from the other side of the world. Factories can be staffed by robots that can communicate their tasks to each other, and they can do more work over a 5G network. Imagine a group of drones(无人机) flying over a field of crops. Then farmers won’t have to work so hard anymore.
But, 5G is not perfect. One major shortcoming has to do with why it’s so fast. 5G uses the millimeter waves, while 4G uses the 15 to 40 centimeter-long waves. And shorter waves go fast but not very far. On 4G networks, the signal can go 10 kilometers. But the 5G signal can go at most 300 meters, and it can’t even go through walls or rain.
1.How does the author show us 5G’s advantages in Paragraph I?
A.By giving examples of the uses of 5G.
B.By making comparisons between 4G and 5G.
C.By explaining the scientific principles of 5G.
D.By analyzing 5G’s development from 4G.
2.According to the author, the self-driving cars will ___________.
A.cause more car accidents.
B.slow down 5G’s development.
C.run without being connected to the Internet.
D.have a much faster reaction speed than humans.
3.What does the underlined part “ be staffed by robots” in paragraph 3 mean?
A.Be built by robots.
B.Have robots as workers.
C.Offer employees home robots.
D.Produce more medical robots.
4.What does the last paragraph mainly talk about?
A.The main weakness of 5G networks.
B.How to make 4G networks more perfect.
C.The types of long waves and short waves.
D.How to improve the communication in rainy days.
高一英语阅读理解中等难度题查看答案及解析
— Shall I inform him of the change of the schedule right now?
— I’m afraid you _____.
A.will | B.may | C.must | D.can |
高一英语单项填空中等难度题查看答案及解析
— I’m thinking of the driving test tomorrow. I’m afraid I can’t pass it this time.
—I’m sure you will make it. _______!
A. No wonder B. Cheer up C. No problem D. No way
高一英语单项填空简单题查看答案及解析
Because of the traffic jams ahead, the policeman, whose voice came out of the fog, was trying to ________ Polly down.
A. break B. turn C. wave D. bend
高一英语单项填空中等难度题查看答案及解析
A car accident happened on the highway because of the heavy fog, but
no one got seriously injured.
A.sadly B.luckily C.hopefully D.unfortunately
高一英语单项填空中等难度题查看答案及解析