TPO 第21套 综合写作题目重新选题
阅读材料
收起Genetic modification, a process used to change an organism’s genes and hence its characteristics, is now being used to improve trees through genetic modification. It is possible to create trees that produce more fruit, grow faster, or withstand adverse conditions. Planting genetically modified trees on a large scale promises to bring a number of benefits.
First, genetically modified trees are designed to be hardier than nature trees; that is, they are more likely to survive than their unmodified counterparts. In Hawaii, for example, a new pest-resistant species of papaya trees has been developed in response to ring spot virus infections that have repeatedly damaged the native papaya tree population. Planting the genetically modified papayas has largely put an end to the ring spot problem.
Moreover, genetically modified trees promise to bring a number of economic benefits to those who grow them. Genetically modified trees tend to grow faster, give greater yields of food, fruit, or other products and be hardier. This allows tree farmer to get faster and greater returns on their farming investment and save on pesticides as well.
Finally, the use of genetically modified trees can prevent overexploitation of wild trees. Because of the growing demand for firewood and building timber, many forests around the world are being cut down faster than they can be replaced. Introducing genetically modified trees, designed for fast growth and high yield in given geographic conditions, would satisfy the demand for wood in many of those areas and save the endangered native trees, which often include unique or rare species.
听力材料
收起写作题目
收起Summarize the points made in the lecture, being sure to explain how they support/contradict specific points made in the reading passage.
答题辅导
收起1.阅读要点概括:
Mainpoint: Planting genetically modified trees on a large scale promises to bring a number of benefits.
Subpoint 1: Genetically modified trees are designed to be hardier than nature trees.
Subpoint 2: Genetically modified trees promise to bring a number of economic benefits to those who grow them.
Subpoint 3: The use of genetically modified trees can prevent overexploitation of wild trees.
2.听力要点概括:
Mainpoint: There are some serious problems and causes associated with the using of genetic modified trees.
Subpoint 1: Genetically modified trees maybe resistant to one particular condition, but it doesn’t necessarily ensure their survival.
Subpoint 2: There are hidden causes associated with the growing genetically modified trees.
Subpoint 3: Genetically modified trees might actually cause even more damage to the local wild trees.