_____ the Chinese have been to Beijing. [ ]
A. None of
B. All
C. Not all
D. No
答案:C
冠状动脉发生粥样硬化易患因素或危险因素中下列哪项不妥
A.高血压B.高血脂症C.吸烟D.糖尿病E.与苯接触