营业员在引导顾客行进时，尽量走在顾客左前方，保持（）的距离。
A.一步
B.两步
C.三步
D.无所谓
参考答案：C
(2013·河北衡水一中六模)Some young people these days just ________ go out of their homes to contact the real world.
A．mustn't
B．won't
C．mightn't
D．shouldn't
肩胛骨下角相当于：
A．同侧膝腱反射减弱或消失B．感觉减退在小腿上外侧及拇趾根部C．对侧膝腱反射减弱或消失D．肛门括约肌障碍E．外踝部及足背外侧感觉减退
