A. that B. which C. like D. as
A. <5% B. 5%~7% C. 8%~10% D. >10% E. >20%
A. words B. remarks C. accents D. speeches
A. 长度长、面积大 B. 肠系膜相对较长,致脱肛发生较多 C. 直肠较长易发生肠套叠 D. 母乳喂养儿肠道内以双歧杆菌为主 E. 人工喂养者肠道内以致病性大肠埃希菌为主
A. much B. little C. more D. few