OG17 Verbal分册 RC-32

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发表于 2017-7-22 22:57:24 | 显示全部楼层 |阅读模式

32题中题干是the author of the passage mentions observations regarding the period of a double-star system as being useful for determining....
题干这句话应该怎么理解呢？
regarding...as being useful显得很奇怪，按理说是直接regard as useful
这句话的理解直接影响了选项应该选哪个
谢谢！