主治虚脱，肠鸣腹痛，泄泻等症的腧穴是（）
A.天枢
B.神阙
C.中极
D.中脘
E.百会
参考答案：B
上颌神经穿经( )
A．眶下裂B．眶上裂C．圆孔D．卵圆孔E．棘孔
Some insects _____ the colour of their surroundings to protect themselves. [ ]
A. take in
B. take off
C. take on
D. take out
