中国营养学会1997年制定了指导我国居民摄取合理营养的建设性文件是().
A.平衡膳食原则
B.中国居民膳食指南
C.膳食指导原则
D.居民膳食目标
参考答案:B
已知函数f(x)=lg(x-2),那么f(x)的定义域是( )
A.R
B.{x|x>2}
C.{x|x≠2}
D.{x|x≠0}
The watches and the the camera materials were not stowed in the poop cabin. They were stowed in the chief officer’s cabin().
A.instead
B.instead of
C.replace
D.replace of