痰液定量培养多少可判定为致病菌（）。

A.≥10⁴cfu/ml

B.≥10⁵cfu/ml

C.≥10⁶cfu/ml

D.≥10⁷cfu/ml

E.≥10⁸cfu/ml

Passage One

Why is Thomas Jefferson mentioned in this passage a. As an example of interracial intimacy. b. Because he was a slave owner and was ply against interracial marriages. c. Because he was one of the early advocates of interracial marriages. d. Because he married a black woman.