247. 參閱下圖分厘卡之讀值為
(A)0.2851
(B)0.2911
(C)0.2901
(D)0.29 
答案:登入後查看
統計: A(2), B(0), C(2), D(0), E(0) #2187303
統計: A(2), B(0), C(2), D(0), E(0) #2187303