目前目视法计算红细胞的最佳稀释液是()
A.Hayem液
B.甲醛枸橼酸盐稀释液
C.生理盐水
D.1%甲醛生理盐水
E.蒸馏水
参考答案:A
对此类创伤的处理原则
A.抗感染
B.止血
C.减少畸形,恢复面形
D.关闭创口,消灭创面
E.以上几点都不对
After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.
A.provided; sit
B.providing; sitting
C.providing; sat
D.provided; sat