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题库 / Prep2007E1-CR-9
Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life. One plan to accomplish this is to establish giant floating seaweed farms in the oceans. When the seaweed plants die, they will be disposed of by being burned for fuel.
Which of the following, if true, would indicate the most serious weakness in the plan above?
Some areas of ocean in the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms.
When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime.
Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel.
Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life.
Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel.
establish seaweed farms in the oceans 为了减少二氧化碳排放同时当Seaweed死也可以燃烧他们当作燃料
目的是减少二氧化碳
措施establish seaweed farms （他们可以当燃料）
题目 W
A没有足够养料种水草 ？和减少二氧化碳有什么关系
B燃烧释放二氧化碳和它总吸收的二氧化碳量相等 相当于这个措施不会让二氧化碳量减少 是不变 对
C一些人不想要用海草这种新燃料？用不用它作为新燃料无关
D7B释放 但5B被植物吸收 这个plant是海草嘛
E 赚更多钱 无关
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