In the arid land along the Colorado River, use of the river's water supply is strictly controlled:farms along the river each have a limited allocation that they are allowed to use for irrigation.But the trees that grow in narrow strips along the river's banks also use its water.Clearly, therefore, if farmers were to remove those trees, more water would be available for crop irrigation.
Which of the following, if true, most seriously weakens the argument?
72.河边种树
本月题目是加强不砍树,大概是树种在河流边(或者是河流的阴面?反正有个 back,理科生表示这样理解不知对不对),然后农民伯伯的 crop 的用水量会增加,然后什么人就说啦:应该把树移走,因为会抢河流里的水。貌似另一个人反驳说不应该砍树,加强后者。
其实就是削弱砍树:
Premise:树和庄稼抢水源
Conclusion:砍树让庄稼多水源
Weaken:削弱措施,即使措施做了结果还是达不到。
In the arid land along the Colorado River, use of the river's water supply is strictlycontrolled:farms along the river each have a limited allocation that they are allowed to usefor irrigation. But the trees that grow in narrow strips along the river's banks also use itswater. Clearly, therefore, if farmers were to remove those trees, more water would beavailable for crop irrigation.Which of the following, if true, most seriously weakens the argument?
A.The trees along the river's banks shelter it from the sun and wind, thereby greatlyreducing the amount of water lost through evaporation.
B.Owners of farms along the river will probably not undertake the expense of cutting downtrees along the banks unless they are granted a greater allocation of water in return.
C.Many of the tree species currently found along the river's banks are specifically adaptedto growing in places where tree roots remain constantly wet.
D.The strip of land where trees grow along the river's banks would not be suitable forgrowing crops if the trees were removed.
E.The distribution of water allocations for irrigation is intended to prevent farms fartherupstream from using water needed by farms farther downstream.