皮肤擦伤、血液凝固、加入柠檬酸钠的血液静置后,都出现淡黄色液体,它们依次是
A:血清、血浆、组织液
B:组织液、血清、血浆
C:血浆、血清、组织液
D:组织液、血浆、血清
--I think it's really necessary. It is reported that the food that Chinese people
every year is enough to feed 200 million people for a year.
①小金利用课余时间阅读课外书籍 ②小胜周末到敬老院做义工
③小红回家自己做饭 ④小欣上课认真听讲