接触扩散
参考答案：某种文化现象易于为接触者所接受，接触该文化现象的人自然地接受了这种文化现象，从而实现了其扩散。
It ______ be the postman at the door. It's only six o'clock.[ ]
A. mustn't
B. can't
C. won't
D. needn't
患者症见头身痛重，肩背不可回顾，腰脊难以转侧，苔白脉浮。治疗应首选
A．九味羌活汤
B．羌活胜湿汤
C．大秦艽汤
D．二妙散
E．独活寄生汤
