慢性腹泻常见的病因是()。
A.食物中毒
B.伤寒
C.小肠吸收不良
D.结肠痛
E.慢性胰腺炎
参考答案:C, E
If the teacher us any homework tomorrow, we will go bike riding.[ ]
A. gives
B. doesn’t give
C. will give
D. won’t give
复合脱氧,有何优点