This _____ factor means that there is often a connection in appearance and temperament between parents and children.
B
暂无解析
下列说法最正确的是()。
C02的化学结合运输方式是_________和_________。
细胞产生动作电位去极相是()
休克的最主要特征是()。
具致病作用的细菌的代谢产物是()