你每跳过一道试题，一定要及时标记。

Every time you skip a question, be sure to mark it in time.

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“问题之一是，旧试题不一定是最有效的学习工具”她说。

"One problem is old tests may not be the most effective study tool," she said.

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据说有一道考试题目，讲的是一位旅行者在一座偏僻小岛上，用支票来付饭钱。

There is a legendary exam question about a traveller who paid for a meal on a remote island by cheque.

youdao

We're also posting a practice exam for you to take, so after you're completely done your studying, it's good to have everything done before you take the practice exam, and then sit down just with this sheet here and your calculator, and ideally a timer, and make sure you can do the practice exam in the allotted amount of time.

我们还将给出一份模拟试题，因此在你完全复习好之后，最好先复习完,再做这份模拟试题，坐下来,只拿出这张表与计算器，最好还有个计时器，确保自己完成模拟题,在规定的时间内。

麻省理工公开课 - 化学原理课程节选