书名：ielts高分模考 / 众文出版 问题位置：P66. 第23题 题型：阅读 / 摘要填空题 -- 题目：Tests were conducted for these on ____ different subjects. ^^^^^ 是指由环境构成的因素 问题：题目如下，这题答案是3, 我把题目解读为实验用了几种不同的主题， 但是後来查Subject也可翻译为受测试者， 从文章看来，实验是测试了2种方向(close work & night light) 但是用了3种受试者(monkeys, chicks & infants) 想请问那这样要如何去界定subjects是指甚麽呢???? 或是我理解题目有误呢？ -- 文章：(主题是Myopia:近视) Researchers have split environmental factors up into two main contributors. One is that too much "close work" is attributed to the development of myopia. The other is theory which states that night lights may be responsible for myopia in infants. For the former, experiment have been conducted on both monkeys and chicks to prove its validity. They were forced to view objects ......(略) .....For the latter, test conducted on infants concluded that those who were exposed to a night light had a greater tendency to develop myopia. -- --

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