67. WHAT SUBSTANCES IS THOUGHT TO STIMULATE THE BRAIN TO MAKE US FEEL...

67 . - 2 DE THI THU DAI HOC CHUYEN THAI BINH CO DAP AN
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67

. What substances is thought to stimulate the brain to make us feel pleasure?

A. Adrenaline. C. Lemon juice. B. Nor adrenaline.D. Manganese dioxide.