人教版卷7-备战2021年高考英语全真模拟卷1月卷（解析版）.docx

备战2021年高考XX【名校、地市好题必刷】全真模拟卷·1月卷
第七模拟
(时间：120分钟 满分：120分)
选择题部分
第一部分　阅读理解(共两节，满分50分)
第一节(共15小题；每小题2.5分，满分37.5分)
阅读下列短文，从每题所给的四个选项A、B、C和D中，选出最佳选项。
A
（2020·江苏启东中学高三月考） Next time your plane lands, listen to the sound of the tyres hitting the ground. The reason the tyres don’t explode is because they are made of natural rubber. The tyres of cars, motorbikes and trucks are also often made of the same stuff.
Natural rubber comes from trees, Workers cut the trunks of the trees and collect a white liquid called latex. In the nineteenth and early twentieth centuries, huge numbers of rubber trees were planted in countries including Malaysia, Burma and Brazil. More than a century ago, scientists discovered how to make man-made rubber, but natural rubber is much stronger and can last much longer. Nearly half the rubber which is produced each year is natural rubber and there is always a need for more.
Rubber trees are not easy to grow. They are affected by changes in temperature, to much or not enough rain, high winds and disease. Some trees survive while others die and it’s all down to their genes. Two British organizations, the Tun Abdul Razak Research Center (TARRC) and The Genome Analysis Center (TGAC), have been working together to look at rubber trees. This is the genes fit together in very long chains of DNA．The genome for a plant such as a rubber tree or animal needs to grow. The genome contains all the information the plant or animal needs to grow. The genome for a plant such as a rubber tree is smaller than a human genome but it is still very long, which is why it has been so difficult to find. As Ewan Mollison of TARRC says, the work has been like putting a picture puzzle together where all the pieces show blue sea and blue sky.
Now scientists can use the rubber tree genome to produce stronger trees. By understanding the genome, they can change the DNA in rubber trees in useful ways. They can al