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参考答案：[*]C:\Documents and Settings\Administrator\桌面\图片\7.jpg
现代企业制度以( )为主体。
A．股份公司制度B．有限责任制度C．企业法人制度D．公司制
A fifteen-pound CO2 extinguisher（）.
A.contains 15 pounds of CO2
B.weighs 15 pounds when full of CO2
C.has 15 pounds of pressure at the nozzle
D.weighs 15 pounds when empty
