单项选择题
Which of the following is NOT true（）
A．The adrenal gland is located on top of the kidney. B．Each kidney is composed of two adrenal glands. C．The medulla is inside the cortex. D．The cortex and the medulla have different functions.
单项选择题 What could be said about the adrenalin （）
单项选择题 It is （）that mainly helps you respond to a dangerous or stressful situation（）
单项选择题 In this passage, the author is mainly discussing the function of（）
