煤炭清洁燃烧技术不包括（）
A.推广超超临界发电机组
B.推广循环流化床技术
C.发展IGCC发电
D.发展热磁振荡发电技术
参考答案：D
She was so interested in the book that she（）it for three hours before she realized it.
A.had read
B.read
C.was reading
D.would have read
