小肠的功能是()
A.受盛化物
B.排泄糟粕
C.受纳腐熟
D.运行水液
E.通调水道
参考答案:A
By the end of last year, they _______ 2,000 English words.
A. learned
B. have learned
C. had learned
D. learns
《大教学论》的作者是杜威。()