LZM E4-26

linnasun

For some birds the sense of smell appears to play a role in navigation, since pigeons with surgically removed olfactory nerves were found to have increased difficulties in homing.

B) have been found to have increased difficulty
D) have been found to have increasing difficulties

The key is B.

Increased 和 increasing 的区别应该是明显的，请问为什么这里 difficulty 要用单数？

[此贴子已经被作者于2003-11-16 14:42:36编辑过]

linnasun

For some birds the sense of smell appears to play a role in navigation, since pigeons with surgically removed olfactory nerves (were found to have increased difficulties) in homing.

括号中是划线部分

linnasun

difficulty 因该是单复数形式均有吧？ 使用起来有什么区别呢？

gemj

以下是引用linnasun在2003-11-16 0:08:00的发言：
difficulty 因该是单复数形式均有吧？ 使用起来有什么区别呢？

都有，全给贴出来：
1
[uncountable]if you have difficulty doing something, it is difficult for you to do
have/experience difficulty (in) doing something
They had great difficulty in finding a replacement.
with/without difficulty
He got to his feet with difficulty.
2
[countable usually plural] a problem or something that causes trouble
difficulty with
There are several difficulties with this theory.
If you have any difficulties , give me a call.
The project soon ran into difficulties .
Difficulties can arise when there is more than one defendant.
We're confident that the legal difficulties can be overcome .
The rearrangement of school classes may cause timetabling difficulties .
Their ten years of marriage have been fraught with difficulties .
the practical difficulties of prosecuting alleged war criminals
The broadcast was delayed because of technical difficulties .
She developed breathing difficulties during the night.
3
[uncountable]if you are in difficulty, you are in a situation in which you have problems
in difficulty
The business is in financial difficulty.
get/run into difficulty (=get into a difficult situation) She soon got into difficulty with debt.
4
[uncountable] the quality of being difficult to do
the difficulty of (doing) something
the difficulty of solving such problems
5
[uncountable] how difficult something is
The tests vary in difficulty.

gemj

这个题目就是have/experience difficulty的用法，在这里用单数，不可以用复数。

linnasun

好厉害！gemj 考前还借人水和油呀，大家一起期待你的好消息：）

znprc

DIFFICULTY指难度,而DIFFICULTIES指具体的困难/问题.本题指难度增加了