Which of the following most logically completes the passage?

On the whole, scientists do their most creative work before age forty, a tendency that has been taken to show that aging carries with it a loss of creative capacity. An alternative explanation is that by age forty most scientists have worked in their field for fifteen or more years and that by then they have exhausted the opportunity for creative work in that field. Supporting this explanation is the finding that ______.

1. the average age of recipientsof scientific research grants is significantly greater than forty
2. a disproportionately large number of the scientists who produce highly creative work beyond age forty entered their field at an older age than is common B
3. many scientists temper their own expectations of what they can achieve in their research work by their belief that their creativity will decline as they age
4. scientists who are older than forty tend to find more satisfaction in other activities, such as teaching and mentoring, than they do in pursuing their own research

E there is a similar diminution of creativity with age in nonscientific fields, such as poetry and musical composition

排除法倒是能选出B，但是是什么意思？？？为啥是B？？？

偶来说两句（其实做这题的时候，做错了，选了D。看了答案，也是莫名其妙）现在

仔细想了想，有点明白了，不过不一定正确，大家多指点哦：）

首先关键在读懂题目，这个非常重要。大致的意思我想是这样的：观点1认为：总体而言

科学家的多数成果是在40岁以前取得的，可推定这样一种趋势：随着年龄的增大，创新

能力是逐渐减少的。另一解释（其实就是反对观点1）：多数科学家在40岁的时候，在其

研究已经至少15年了，所以创新的机会少了。（言外之意：不是没有创新能力，而是机

会没有了。这个能理解吧：）题目问下面那个选项支持这种解释。

先说正确答案：B 在年过40而有创新成果的科学家中，相当一些人在进入他们的研究领

域时是年事较高的。（这个要好好想哦）

看到了吧，B选项直接就否定了观点1，同时也暗示观点2是对的——给他们（过40岁的）

机会，60岁的人或许比50岁的人更有创新能力。

其他选项：A 有研究课题可做的科学家平均年龄超过40岁 （有没有出创新成果？不知道。

而且暗示他们机会多——否定观点2）

 C 很多科学家自己认为年龄大了创新能力也就少了，故心有余而力不足 （明显支持观点1）

 D 超过40岁的科学家在科研之外还有很多乐事可做，比如教书或者当导师 （转换职业不等于创新——和问题无关）

 E 在非科研领域，比如诗歌或音乐，大抵如此——能力降低 （明显支持观点1）

各位看明白了？只有B选项把40岁和创新两个要素有机结合并支持一个观点（不明显），

同时反对另一观点（非常明显）

有不对的地方，请斧正哦：）

 理解a net burden的意思，政府不要亏嘛。

好像没解决我的问题噢！

UP!