组装锅炉为上、中、下三层组装型时，锅炉房往往为多层锅炉房．此时一般可采用旋转悬臂式起重机进行吊装。( )
参考答案：对
After the new technique was introduced, the factory produced _______ cars in 2009 as 10 year before.
A．as twice as many
B．as many twice
C．twice more as
D．twice as many
正始诗人阮籍最著名的诗作是（）.
A.咏怀诗
B.幽愤诗
C.拟古诗
D.悼亡诗
