19.(Early) signs (characteristic) of the acute phase of viral hepatitis in (adults) are abdominal pain, nausea, and (feverish) often accompanied by chills. 答案是D. 这里 signs 和characteristic之间是有什么联系? 主语是signs 还是characteristic ?
25.With little (nor) no mass and (no) electric charge, neutrinos can penetrate a solid object such as the Earth (as) if it (were) not there. 答案是A. D为什么不是was ?
30.Transistors (exhibit) a high amplification factor, operate without (distorted) over a (wide frequency) range, and can be made (extremely small). 答案是B. 要怎样该 ?
0201
12.In the diurnal type of tidal oscillation, the alternate rise and fall of sea level, a single high water and a single low water occur __ tidal day. (A)each (B)each of (C)each of the (D)of each 答案是A. C为什么不对 ?
25.In (the early) nineteenth century, the Cherokee nation of American Indians (was adopted) a written constitution (based) on (that) of the United States. 答案是B. 要怎样该 ?