国家级重点文物保护的建筑物按防雷要求属于（）类。
A.一
B.二
C.三
D.四
参考答案：B
德育过程的正面性
Which of the following types of companies are more likely to use the payback method to evaluate capital projects（）
A. Asian companies and private companies.
B. European companies and private companies.
C. Asian companies and larger companies.
