An analyst does research about various companies and stocks. A company has experienced stable earnings over the previous years and the company has a high beta. These factors best describe a:

A. cyclical company and a defensive stock.
B. defensive company and a cyclical stock.
C. defensive company and a defensive stock.

在对结构油箱所有接缝、铆钉、螺母垫圈和检查口周围进行密封处理时，密封剂：（）.

A.必须涂满整个油箱内表面

B.必须涂满蒙皮内表面

C.仅施加于翼梁和翼肋连接处

D.仅分别施加于连接缝隙处