采用负荷实验评价成人维生素B1营养状态时
摄人维生素B,后,收集尿液的时间为
A.4小时内
B.6小时内
C.8小时内
D.12小时内
E.24小时内
参考答案:A
By the time he realizes he into a trap, it’ll be too late for him to do anything about it.
A.walks
B.walked
C.has walked
D.had walked
填塞止血法是怎样的?