在企业有固定成本时经营杠杆系数总是()
A.大于1
B.小于1
C.等于1
D.无法确定
参考答案:A
______ to sunlight for too much time will do harm to one's skin. [ ]
A. Exposed
B. Having exposed
C. Being exposed
D. After being exposed
良性胃溃疡好发于()
A.贲门区
B.胃底
C.胃小弯近胃角切迹处
D.胃窦
E.胃体