北师大版 选修7 Unit 20 Period 4 Communication Workshop
【小题1】They saw something flying o
【小题2】Hardly had we seated ourselves when the meeting was d
【小题3】These new discoveries have broken new ground in the e
【小题4】With the increase of production and human activities, there is a natural p
【小题5】Try to go out for a walk after lunch, if the weather p
【小题6】Some mushrooms are good to eat; some, however, are
【小题7】It’s clear that any driver found drinking
【小题8】This drug is very effective at the
【小题9】The disease, if not treated in time, can cause
【小题10】The Yangtze River is a natural
【小题1】We are always encouraged to live a low-carbon life
【小题2】People began to
【小题3】The number of people driving drunk has
【小题4】We’re sure to win in the end
【小题6】Write the telephone numbers down
【小题7】Write home as often as possible
【小题8】We used the money to
【小题9】Memories of my sister
【小题10】The English lesson started with a joke and
【小题1】It’s acknowledged that great changes in our country have been taken place in the last decades.
【小题2】Early retirement is a relatively new phenomena in Britain.
【小题3】He set off earlier than before in order catch the early train.
【小题4】The experiment turned out great success, which we hadn’t expected at all.
【小题5】He is a teacher of rich experience, from which we have learned a lot over the years.
【小题6】He rather than you are responsible for the event.
【小题7】Such many questions were put forward that we had to delay our meeting until 6 p.m.
【小题8】For all the preparations have been made, we can start our experiment as planned.
【小题9】Never walk behind a horse in case of it kicks you.
【小题10】The measures made an important contribution to reduce industrial accidents.
4. According to a study published last week in the journal Science, scientists have found a way to change a plant’s genes (基因) in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world.
By changing a plant’s genes, the scientists were able to increase leaf growth on plants by 14-20 percent. Specifically, scientists changed the plant’s protective (保护的) system. “Normally, this system is activated when a plant gets too much sunlight,” said scientist Krishna Niyogi, co-author of the study. “When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in the shade, the protective system is turned off. But the process is slow.”
Stephen Long is the lead author of the study. He compared a plant’s protective system to light-adjusting glasses. “When a person wears the glasses outside during the day, the lenses (镜片) darken and lighten depending on how sunny it is. Plants do the same thing,” he said. “But in plants the adjustment can take anywhere from 10 minutes to an hour. This makes it hard for plants to get the right amount of sunlight needed to create food.”
The new study sped up the process. By changing the plant’s genes, it’s more quickly than normal to turn on and turn off the protective system. As a result, leaf growth on the plants scientists used in the study increased. Leaf growth on two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists conducted the study on tobacco plants. But they thought the genetic modification would produce the same results in corn or rice.【小题1】What does the plant’s protective system need to keep activated?
|A．Mild shade.||B．Leaf growth.|
|C．Genetic changes-||D．Enough sunlight.|
|A．Because it isn’t always sunny.|
|B．Because leaf growth increases too slowly.|
|C．Because the light-adjustment process is a bit long.|
|D．Because the protective system is turned on and off more quickly.|
|A．Changing how a plant uses sunlight could mean more food in the future .|
|B．When the plant is in the shade, its protective system is turned off slowly.|
|C．Too much sunlight will damage plants’ protective system.|
|D．It is hard for plants to create food without enough sunlight.|
5. Proper pressure can be a good thing: It can push you toward accomplishing tasks.
Psychotherapist Tom suggests an effective yet simple relaxation technique: Slowly expel (排出) all the air from your lungs until there is nothing left and then count to 3 before taking the next breath normally.
Keep healthy daily habits
Ensure that you are eating healthy foods.
Regardless of how much pressure the other person is applying, or how much stress you feel, avoid reacting before you have had a chance to calmly consider what you think about the issue. Leave the room and go for a walk, make some coffee or sit alone in a quiet spot to allow yourself to decide what is the best for you.
|A．Think twice before you do|
|B．Repeat this two to four times|
|C．Take a break to recollect your thoughts|
|D．Make sure that you are getting enough sleep|
|E．It can also help you focus your attention so you perform better|
|F．With more, you may be too anxious to handle difficult situations|
|G．Staying calm requires you to keep a few important things in mind|
Mike is a specialist in algebra and geometry. His only recreation is
One day, he was invited to a seminar held by
Shortly after the seminar began, many issues were put forward, such as
Finally, Mike declared that he brought two new inventions. One was a kind of liquid
The organisation also encouraged people
Last summer I had chance to visit Paris. That attracted me most was the Eiffel Tower, which has become a symbol of France. I was deep impressed by its height. I have never seen such a tall building ago! It is made of iron and it is about 10,000 tons in weight. There are 1,665 step from the bottom to the top. Climb the tower made me very tired, and I was very excited. I took a lot of photos in Paris.
I have much memories and experiences to share with. I am so lucky to have seen such a culture so different from my own. I will remember my trip in France forever!
How are you? I am chairman of Student Union, Li Hua. ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
I am looking forward to your reply.