A:①②
B:③④
C:①④
D:②③
如图为人体消化系统的部分结构示意图,下列叙述正确的是( )
—I think it's really necessary. It is reported that the food that Chinese people _____ every year is enough to feed 200 million people for a year.
正在患流行性感冒的病人属于( )