具体是可数还是不可数要在具体语言环境中体现,你可以只记一方面,记住可数的,其他方面大多为不可数了.在牛津词典的标注中,一种含义的注释前面都有 [C,U],所以,此题不能完全绝对的回答
1) effect作“结果”解时,是可数名词,与cause相对
例句：He dwelt on the war from effect to cause.
他评述了战争的前因后果.
2) effect 作“作用；影响”解时,表示“对……产生作用”,要用介词on.若前面有动词give,后可接介词to.
例句：He felt sick from the effect of weather.
他因天气变化感到不适.
Our warning produced no effect on him at all.
我们的警告对他未起丝毫作用.
A word from the teacher will have a great effect on our son.
老师的话会对我们的儿子起很大作用.
Flowers arranged in a vase give a charming effect to a room.
插花给房间增添了色彩.
联想记忆：含有effect的短语：
1) 表示无效的短语：be of no effect,to no effect,with little/no effect,without effect
2) 表示“实现；实行；实施”的短语：
bring into(to) effect,carry… into effect,give effect to,put… into effect,come(go) into effect,
in effect
辨析：effect和affect
affect只能用作动词,表示to have an effect on…强调影响的动作,后面常跟具体名词作宾语,
强调发生“对……有害”的影响.
例句：The climate affected his health.
气候对他的健康产生影响.
Failures did not affect him at all.
失败未对他造成影响.
effect既可作动词,也可作名词,表示“to produce… as an effect”强调达到的效果,后面常
跟表示改进变化的宾语.
例句：They effected their plan with much difficulty.
他们历尽千辛完成了计划.
