18.At an enormous research cost, a leading chemical company has developed a manufacturing process for converting wood fibers into a plastic. According to the company, this new plastic can be used for, among other things, the hulls of small sailboats. But what does the company think sailboat hulls used to be made of? Surely the mania for high technology can scarcely go further than this.
18. The author’s opinion of the manufacturing process described in the passage is based primarily on the fact that
(A) plastic is unlikely to be durable enough for high-quality sailboat hulls
(B) the research costs of developing the process outweigh any savings possible from the use of the plastic
(C) a small sailboat is not normally regarded as a high-tech product
(D) hulls for small sailboats can be made from wood without converting it into plastic
(E) many other spheres of human activity are in far greater need of technological research
2. Which of the following best completes the passage below?
One tax-reform proposal that has gained increasing support in recent years is the flat tax, which would impose a uniform tax rate on incomes at every level. Opponents of the flat tax say that a progressive tax system, which levies a higher rate of taxes on higher-income taxpayers, is fairer, placing the greater burden on those better able to bear it. However, the present crazy quilt of tax deductions, exemptions, credits, and loopholes benefits primarily the high-income taxpayer, who is consequently able to reduce his or her effective tax rate, often to a level below that paid by the lower-income taxpayer. Therefore, ______
(A) higher-income taxpayers are likely to lend their support to the flat-tax proposal now being considered by Congress
(B) a flat-tax system that allowed no deductions or exemptions would substantially increase actual government revenues
(C) the lower-income taxpayer might well be penalized by the institution of a flat-tax system in this country
(D) the progressive nature of our present tax system is more illusory than real
(E) the flat tax would actually be fairer to the lower-income taxpayer than any progressive tax system could be
1. 选C 吗？
2. 一项最近赢得越来越多支持的税务改革的建议是试行单一税制，即在不同收入的人中试行统一税率。反对单一税制的人说累进税制更公平，即对高收入试行高税率，因为要加重有承受能力人的负担。然而，目前的税务减免等拼凑起来都有益于高收入的纳税人，这些人将税率减少到低于低收入纳税人的税率水平。
选D吗？我这样理解：
a． 高收入纳税人支持单一税制（反了）
b． 单一税制能增加政府收入（不一定，不知道税基）
c． 低收入纳税人被单一税制处罚（没说）
e． 一税制必累进税制对低收入纳税人更加公平（不对，文中已指出因为有逃税）
答案都是D
求助，我也不会。。
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