59. About 18 percent of all bacterial emissions in the room — including both fresh and previously deposited bacteria — came from humans, __________opposed to plants and other sources.
(A)as
(B)that
(C)what
(D)which
答案:登入後查看
統計: A(12), B(5), C(1), D(14), E(0) #1615136
統計: A(12), B(5), C(1), D(14), E(0) #1615136