大便隐血试验阳性提示每天出血量大于()
A.5mL
B.50mL
C.400mL
D.1000mL
E.800mL
参考答案:A
The document film ______ next week aims at introducing local cultures to the world.
A.released
B.being released
C.to be released
D.having been released
一般情况下,旅行社经营的产品可以分为三类:______、______和______。