河北省武邑中学2017-2018学年高二上学期入学考试英语试卷_高中英语试卷

河北省武邑中学2017-2018学年高二上学期入学考试英语试卷

　　B. They ignored others’ ungreen behavior.

　　C. They chose better chemical cleaners.

　　D. They tried to get out of their ungreen habits.

　　31. What can we infer from the last paragraph?

　　A. The couple may continue their project in the future.

　　B. The government will give support to the green project.

　　C. Some people disagree with the couple’s green ideas.

　　D. Our Green Year is becoming a national campaign.

　　Would it surprise you to learn that, like animals, trees communicate with each other and pass on their wealth to the next generation?

　　UBC Professor Simard explains how trees are much more complex than most of us ever imagined. Although Charles Darwin thought that trees are competing for survival of the fittest, Simard shows just how wrong he was. In fact, the opposite is true: trees survive through their co-operation and support, passing around necessary nutrition “depending on who needs it”.

　　Nitrogen (氮) and carbon are shared through miles of underground fungi (真菌) networks, making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This hidden system works in a very similar way to the networks of neurons (神经元) in our brains, and when one tree is destroyed, it affects all.

　　Simard talks about “mother trees”, usually the largest and oldest plants on .which all other trees depend. She explains how dying trees pass on the wealth to the next generation, transporting important minerals to young trees so they may continue to grow. When humans cut down “mother trees” with no awareness of these highly complex “tree societies” or the networks on which they feed, we are reducing the chances of survival for the entire forest.