LZM书上的几个问题

junarry

以下是LZM书中几题
E9-47 Some psychiatric studies indicate that among distinguished artists (the rates of manic depression and major depression are ten to thirteen times as prevalent as in) the population at large.
E manic depression and major depreeion are ten to thirteen times more prevalent than in
请分析为何E是正确而A不对

E9-48 Bob Wilber became Sidney Bechet's student and protege when he was nineteen and, for a few years in the 1940's, came as close to being a carbon copy of the jazz virtuoso in performance( as anyone has ever come.)
C as anyone ever had done
请翻译一下，并为何A对C不对

E9-2 Freedman's survey showed that people living in small towns and rural areas consider themselves （no happier than do people living） in big cities.
Ｅnot as happy as are people who live为何不对呀，而选A
而且我认为no 是形容词，怎可以修饰happier


E9-3 The spraying of pesticides can be carefully planned,  but accidents, (weather conditions that could not be foreseen, and pilot errors often cause much larger depoits of spray than they had) anticipated.

b weather conditions that cannot be foreseen, and pilot errors often cause much larger deposits of spray than
e unforeseeable weather conditions, and pilot errors often cause much larger deposits
of spray than they had
选b,我认为e可以，此处要用情态动词吗？
请分析一下could,can,would,will,should,其中could和can是不是可以替换

谢谢

tongxun

E9-48 Bob Wilber became Sidney Bechet's student and protege when he was nineteen and, for a few years in the 1940's, came as close to being a carbon copy of the jazz virtuoso in performance( as anyone has ever come.)
C as anyone ever had done
包波在19岁的时候成为了三地的学生和学徒，经过几年后在20世纪40年代，包波在爵士乐演奏方面成为一个名手，就象其他人所经历的那样。
用had表示的过去的那些人，或早于胞波的那些人，但在胞波之后，这种类似的事情还是在不断重复的，所以用现在完成式比较好。

no 在BE 与表语或其他形容词前面的意思是：绝不是。的意思。

要用！因为情态动词表达的意思和无情态动词表达的意思是有区别的。
could 可以表示虚拟，但can 不可以。

vin0410

E9-47 Some psychiatric studies indicate that among distinguished artists (the rates of manic depression and major depression are ten to thirteen times as prevalent as in) the population at large.
E manic depression and major depreeion are ten to thirteen times more prevalent than in
请分析为何E是正确而A不对

一个是rate的比较, 一个是depression的比较
Provided (rate of depression is prevelant…), it's kind of odd.

A and B are more prevalent among artists than (A and B are) in the population
The rates of A and B are more prevalent among artists than (the rates are) in the population