单项选择题
A.12h;28~30B.20h;30~36C.24h;37~40D.36h;42~47
A.1~2B.2~3C.4~5D.6~8
A.藻酸盐类敷料B.泡沫类敷料C.水胶体类敷料D.水凝胶类敷料