-- I didn't go to class last night because my car broke down

-- I didn't go to class last night because my car broke down.-- You __________

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The sentence in the sixth paragraph "Similar signals also...

The sentence in the sixth paragraph "Similar signals also... for disease" implie

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桑代克认为最基本的学习规律有三条:效果律、练习律和_________。

桑代克认为最基本的学习规律有三条:效果律、练习律和_________。

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