1. Letter to the editor: If the water level in the Searle River Delta continues to drop, the rising sea level will make the water saltier and less suitable for drinking. Currently, 40 percent of the water from upstream tributaries is diverted to neighboring areas. To keep the delta’s water level from dropping any further, we should end all current diversions from the upstream tributaries. Neighboring water utilities are likely to see higher costs and diminished water supplies, but these costs are necessary to preserve the delta.
Which of the following would, if true, indicate a serious potential weakness of the suggested plan of action?
A. Desalination equipment would allow water from the delta to be used for drinking even it if became saltier.
B. Water level is only one factor that affects salinity in the delta.
C. The upstream tributaries’ water levels are controlled by systems of dams and reservoirs.
D. Neighboring areas have grown in population since the water was first diverted from upstream tributaries.
E. Much of the recent drop in the delta’s water level can be attributed to a prolonged drought that has recently ended.
2.The recycling of municipal solid waste is widely seen as an environmentally preferable alternative to the prevailing practices of incineration and of dumping in landfills. Recycling is profitable, as the recycling programs already in operation demonstrate. A state legislator proposes that communities should therefore be required to adopt recycling and to reach the target of recycling 50 percent of all solid waste within 5 years.
Which of the following, if true, most seriously calls into question the advisability of implementing the proposal?
A. Existing recycling programs have been voluntary, with citizen participation ranging from 30 percent in some communities to 80 percent in others.
B. Existing recycling programs have been restricted to that 20 percent of solid waste that, when reprocessed, can match processed raw materials in quality and price.
C. Existing recycling programs have had recurrent difficulties finding purchasers for their materials, usually because of quantities too small to permit cost-effective pickup and transportation.
D. Some of the materials that can be recycled are the very materials that, when incinerated, produce the least pollution.
E. Many of the materials that cannot be recycled are also difficult to incinerate.
参考答案：
作者: h1hh 时间: 2021-7-7 12:29
EB作者: CaryX 时间: 2021-7-7 14:44
Mark一下！ 作者: miemie_yang 时间: 2021-7-7 18:51
A A作者: sssszzzzxccsc 时间: 2021-7-7 20:47
db作者: Leilanico 时间: 2021-7-8 02:56
EC 作者: Leilanico 时间: 2021-7-8 03:07
第二题的C选项，我忽略了“quantities too small to permit cost-effective” ，这个选项其实是strengthen the argument的。 作者: Alan-Endless 时间: 2021-7-21 00:34
看一下！ 作者: 12121212133 时间: 2021-7-21 18:03
Mark一下！ 作者: ccccherry 时间: 2021-7-28 20:53
CB作者: 大月亮cyn 时间: 2021-10-11 11:22 Day51 1. [Weaken] E
上游支流引水-->SRD水位drop E recent drought --> SRDd水位drop 他因削弱 2. [Weaken] B
[C] reach the target of recycling 50 percent of all solid waste within 5 years
B 削弱结论方案不可行，Existing recycling programs have been restricted to that 20%SW