og251

251. The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970’s.

(A) extinction; its numbers are now five times greater than

(B) extinction; its numbers are now five times more than

(C) extinction, their numbers now fivefold what they were

(D) extinction, now with fivefold the numbers they had（A）

(E) extinction, now with numbers five times greater than

I quite don't understand OG's explanation. (In B, the construction its numbers are ...more is not idiomatic: there are more birds, but not more numbers. ) What's the difference between ..more than... and ...greater than...? What's the difference between its number and its numbers? og 161 also tests the difference between ...more than... and ...greater than...., and it says " Density, an abstract 'mass' noun, is logically construed with greater than". Can some NN give me a general rule of using more than vs greater than? Thanks in advance.

I have more apples than you have.

The number of apples in the basket is greater than that in the box.

由此可见，more than是比较具体事物，而greater than用于比较number这个概念

哈囉　又見面了　我的看法是後者

the number of apples=that

舉例來說

OG-8.     Lacking information about energy use, people tend to overestimate the amount of energy used by equipment, such as lights, that are visible and must be turned on and off and underestimate that used by unobtrusive equipment, such as water heaters.

(A) equipment, such as lights, that are visible and must be turned on and off and underestimate that

(B) equipment, such as lights, that are visible and must be turned on and off and underestimate it when

(C) equipment, such as lights, that is visible and must be turned on and off and underestimate it when

(D) visible equipment, such as lights, that must be turned on and off and underestimate that（D）

(E) visible equipment, such as lights, that must be turned on and off and underestimate it when

答案選D，這裡的that是指the amount of energy

版主講的是同一個意思

实在太谢谢agk99了， 是否可以再解释一下number和numbers的区别？这里为何用numbers?

建议楼主搜索以下number会有好多相关链接的哦http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=11529

请问greater than 后面是不是省略了those(parallel to its numbers)

Thanks

Post again:

请问greater than 后面是不是省略了those(parallel to its numbers)

Thanks