瘰疬的好发对象为（）
A.儿童和青年
B.男性
C.女性
D.中年
E.老年
参考答案：A
Her question was so difficult that I could hardly make any ____ of it at all. [ ]
A. explanation
B. meaning
C. sense
D. idea
请简述什么是SWOT分析。
