复合式听写答案：

　　36 concentrated                            40 row 

　　37 information                             41 suspected

　　38 depends                                 42 phenomenon (现象)

　　39 straight                                43 efficiently

　　44  our second rule of learning is this: it is better to study fairly briefly but often。

　　45  Let’s say you are trying to learn some new and rather difficult English vocabulary using a stack of cards。

　　46  The answer is it is better to space out the presentations of the word you are to learn。

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