接种结核菌素的部位是（）
A.前臂内侧下段
B.上臂三角肌
C.前臂外侧
D.三角肌下缘
参考答案：D
The school shop，________ customers are mainly students，is closed for the holidays.[ ]
A．which
B．whose
C．when
D．where
胃气不和
