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【单选题】
人类短时记忆的广度为A.
5±2个信息单位
B.
7±2个信息单位
C.
6±2个信息单位
D.
9±2个信息单位
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A.
They tend to exaggerate the healthful effect of “light” beer
B.
They usually ignore the effect of exercise on losing weight
C.
They prefer “light” beer and low-calorie bread to other drinks and food
D.
They know the factors that play a positive role in keeping down body weight
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