继续请教语法题

alvinzhangUID: 198862

2004.10
15. A challenging new area in inorganic chemistry is ---- the role of transition metals in the biochemical catalysts called enzymes.
(A) that of understanding
(B) to have understanding
(C) the understanding
(D) understanding that
答案：A
请问A的用法如何解释？ 如果把B改为to understand是否正确？

37. Among the most complex crystals are that of silicon dioxide, which has seven different structures at various temperatures and pressures, the most common being quartz.
答案：B
此题与上题应该是同一类型，为何错了呢？

39. By 1810 the 23 towns of Hampshire County, Massachusetts, had reached a remarkable uniform of economic development as well as population density.
答案：D
请教as well as 的用法！

冰雨1123UID: 2116492

个人意见:
1.用排除法只能选A; B改为to understand正确
2.上面一题是 is ,这里是are,所以 that 应该改为 those
3. as well as
adv.
也, 又
应该改为 and连词

drunkenfisherUID: 2162548

37. are -- of silicon dioxide
of 前的部分与are 一致所以应该用复数 those
15.that 指new area ,   

39. 不会，等待高手吧 ^_^

drunkenfisherUID: 2162548

不同意楼上的解释
as well as 可以做 介词啊
The editors as well as the proofreaders are working overtime.
这不是错误的原因

冰雨1123UID: 2116492

as well as 可以做 介词,但是上面需要的是连词.

英汉航海大词典 as well as
prep.象...一样也,不但...而且  

The editors as well as the proofreaders are working overtime.
用 不但...而且   还讲得通.

可是上面是指
economic development和 population density的  a remarkable uniform
所以只能用and

继续讨论.

[ 本帖最后由 冰雨1123 于 2006-1-4 11:29 编辑 ]

alvinzhangUID: 198862

37题，which代表的是silicon dioxide吧，后面是has，所以前面应该是单数啊！为什么要用those呢？还是有些不太懂，请指教！谢谢！

冰雨1123UID: 2116492

which 指代silicon dioxide,不是 those of silicon dioxide
但是are 的谓语是those of silicon dioxide
个人理解.

jackloveUID: 183611

牛津说：They sell books as well as newspapers.
既。。。。又。。。。 和and怎么区分？

冰雨1123UID: 2116492

Massachusetts, had reached a remarkable uniform of economic development as well as population density.
  Massachusett已经达到了一个明显的统一,既是经济发展, 又是人口密度.
Massachusetts, had reached a remarkable uniform of economic development and population density.
  Massachusett已经达到了一个经济发展和人口密度的统一.

as well as 做既... 又...是
英汉航海大词典 as well as
prep.象...一样也,不但...而且  

我觉得用 AND(连词)好.前面有a remarkable uniform of

[ 本帖最后由 冰雨1123 于 2006-1-4 12:26 编辑 ]