242. Even their most ardent champions concede that no less than a technical or scientific breakthrough is necessary before solar cells can meet the goal of providing one percent of the nation's energy needs. A.that no less than a technical or scientific breakthrough is necessary B.that nothing other than a technical or scientific breakthrough is needed C.that a technical or scientific breakthrough is necessary D.the necessity for an occurrence of a technical or scientific breakthrough E.the necessity for a technical or scientific breakthrough occurring AB的语气强，而C的语气弱，答案不是要求不能改变原文的语气么，为什么要选C，而不选AB那？
234. The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye. A.infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long to be registered by the eye B.however, the wavelength of infrared radiation--0.1 millimeters--is too long to be registered by the eye making it invisible C.infrared radiation, however, is invisible because its wavelength--0.1 millimeters--is too long for the eye to register it D.however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible E.however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible 此处不明白的是：眼睛register的应该是wave,怎么会是wavelength那？
180. Quasars are so distant that their light has taken billions of years to reach the Earth; consequently, we see them as they were during the formation of the universe. A.we see them as they were during B.we see them as they had been during C.we see them as if during D.they appear to us as they did in E.they appear to us as though in D ambiguously suggests that the quasars appeared to us in the formation of the universe---that is, as though we were present to view them then. 此处关于D的解释不太明白，哪位大侠给解释翻译一下？
136. Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries. A.it is so debilitating that it has become an economic B.it is of such debilitation, it has become an economical C.so debilitating is it as to become an economic D.such is its debilitation, it becomes an economical E.there is so much debilitation that it has become an economical C这个答案不是倒装结构么，我看着挺顺的，怎么就是不对呢？
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2003-8-31 10:22:00
)这题主要还是考too..to结构和句子修饰。
