20.正常人血液中白血球的含量佔血球細胞總數的多少?
(A) 4%
(B) 3%
(C) 2%
(D)少於 1%
答案:登入後查看
統計: A(36), B(31), C(27), D(288), E(0) #2735433
統計: A(36), B(31), C(27), D(288), E(0) #2735433