题型：任务型阅读 题类：模拟题 难易度：普通
北京市房山区2020届高三英语第一次模拟考试试卷
Mystery of Mosquito Flight
The mosquito is a troublesome and dangerous insect. Their bites itch and can carry dangerous diseases, like malaria, Zika virus and yellow fever. Recently, researchers from Britain and Japan discovered how mosquitoes fly.
Mosquito wings are small and have an uncommon shape. So, how is their flight possible? The team of scientists from Britain and Japan solved the mystery. They used high-speed cameras and computer images to understand the mechanics of how the insect moves its wings to stay in the air.
They set up eight super-high speed cameras that take 10,000 images each second. Simon Walker, a researcher at the University of Oxford, explains that normally at least two cameras are needed to record an insect, so they've got enough views of an insect. With two camera views they can then take any point on an insect and calculate its 3-D coordinates (三维坐标).
Mosquitoes can spread diseases. The insect has two antennae, or tall, thin organs on its head that it uses to feel things. But its antennae and six legs make it difficult to take clear images of the wing movements. The extra cameras let the researchers see that the mosquito's wings move eight hundred times each second. That is four times faster than many insects of a similar size.
Mosquitoes fly by moving their wings in several different directions. The thin top edges of their wings move forward first and then they change direction and move down. The movement looks as if the wings are drawing the number eight. Walker says that existing unmanned flying devices do not work very well outside because wind can affect their flight.
"Insects, on the other hand, deal really well with even quite windy conditions. So understanding how they can do this is going to be advantageous to us." These researchers say that understanding how mosquitoes fly might help find ways to stop them from spreading diseases.
A. Because of this, it is hard to believe that they are able to fly.
B. Mosquitoes evolved from other insects about 226 million years ago.
C. So, the team needed to use eight cameras to view the wings from many directions.
D. Researchers at the University of Oxford took images of mosquito wing movements.
E. Many measures have been tried for mosquito control, for example, getting rid of breeding places.
F. This knowledge, they say, help find ways to stop mosquitoes from spreading diseases in the future.
G. The research team believes the mosquitoes' wing movements could help inventors design new flying devices.
Of the many unpleasant emotions we can experience, fear may top the list. {#blank#}1{#/blank#}. Fear can also keep us from pursuing the things in life that really matter — like following our dreams, and developing important relationships. I have some ideas, though, of how to be free from fear.
Experience fear.
I used to be very afraid of speaking in front of people. I would get sweaty palms and my stomach would be so tied up that I wouldn't be able to eat. However, each time I spoke, I noticed afterwards that it wasn't that bad. Things I fear are never as bad in reality as I make them out in my mind. {#blank#}2{#/blank#}.
Create space.
The first and most important step to being fearless is to create some space between ourselves and the emotion of fear. This isn't accomplished by ignoring the fear, or trying to talk ourselves out of it. {#blank#}3{#/blank#}. In fact, a recent research shows that by simply admitting the emotion we actually begin to reverse the "fight or flight(逃避)" response in the body.
Control the breath and feel the fear.
Once we acknowledge the presence of fear, the second step is to control the breathing so that it becomes slower and gentler. We try to make the breath just a little bit longer, and feel how fear manifests(展现) in the body. {#blank#}4{#/blank#}.
With practice, we can create enough space between us and the emotion of fear so that we're able to replace a fearful thought with a positive one. {#blank#}5{#/blank#}. For instance, before I get up to speak in front of a group of people, I imagine that the audience is positively impressed by what I say and that I manage to complete the speech successfully.
A. Space is created only when we can honestly acknowledge that fear exists. B. We can imagine a positive outcome for whatever we're about to do. C. Fear, if left uncontrolled, can even destroy our life. D. So one way to get rid of fear is to simply push ourselves to do things that we fear. E. When we can see a positive outcome in our mind, fear no longer holds us back. F. But fear is more than just physically unpleasant. G. As we pay attention to the physical symptoms of fear, we can see fear objectively. |
试题篮
