关于小儿腹泻的预防,正确的措施是()。
A.科学添加辅食
B.注意饮食卫生
C.避免腹部受凉
D.提倡母乳喂养
E.断奶不受季节限制
参考答案:A, B, C, D
根据考古学的成果可知,早在()万年前,三峡地区的巫山一带,便有了人类活动的踪迹。
The master shall ensure that any seafarers()are provided with an adequate period of rest.
A.who have performed work for 14 hours
B.who have performed work in a scheduled rest period
C.who have performed work in a scheduled work period
D.who works hard