关于rate of和rate for的区别.

八戒

State officials report that soaring rates of liability insurance have risen to force cutbacks in the operations
of everything from local governments and school districts to day-care centers and recreational facilities.
(A) rates of liability insurance have risen to force
(B) rates of liability insurance are a force for
(C) rates for liability insurance are forcing
(D) rises in liability insurance rates are forcing
(E) liability insurance rates have risen to force

In choices A and B, rates of is incorrect; when rates means "prices charged," it should be followed by for.

以前有人讨论过,不过我感觉好象不完整.
ETS对rate for 的解释是:when rates means "prices charged," it should be followed by for.

但实际上ETS在其他的用法都有背于他自己的解释:
比如:
The passage provides information that would answer which of the following questions?
(A) What was the average annual amount, in dollars, of minority business receipts before the SBA strategy was implemented?
(B) What locations are considered to be unfavorable for minority businesses?
(C) What is the current success rate for minority businesses that are capitalized by MESBIC’s?
(D) How has the use of federal funding for minority businesses changed since the 1960’s?
(E) How do minority businesses apply to participate in a MESBIC program?

To begin to control a disease caused by a protein deficiency, the passage suggests that a promising experimental treatment would be to administer a drug that would reduce
(A) only the degradation rate for the mRNA of the protein involved
(B) only the synthesis rate for the mRNA of the protein involved
(C) both the synthesis and degradation rates for the mRNA of the protein involved
(D) the incidence of errors in the transcription of mRNA’s from genetic nucleotide sequences
(E) the rate of activity of ribosomes in the cytoplasm of most cells

如果按照ETS在OG上的解释,对上诉在阅读中rate for的用法根本就是搬石头砸自己的脚.

rate for 和 rate of 的区别什么?

还请大家指教呀!

多谢!

八戒

晕到...........

好象有人问过了.....

呵.......

自己在支持一下:

rate 可以表示 ”费用“（prices charged）
e.g.
Some hotels offer special rates for children.
做费用时用for 表示 费用的对象.

我想是不是这么理解:

其实固定搭配应该是 the rate of
在此,of 后面的名词修饰rate
比如:the rate of unemployment

而for指代对象，其实也就是如果后面是for，那么这个rate也就有了固定了意思了．无须for后面的对象来解释．

这样对吗？

还请多指教呀？

crusaders

看晕了
顶！！！