The author in Paragraph 1 describes Texans as a class of people who are

A．of a mixture of personality consisting of both morality and immorality

B．of a mixture of nature consisting of both pride and violence

C．more sensitive to criticisms of their uncivilized conducts

D．born to be savage and uncivilized people

药物作用是指：（）

A.药理效应

B.药物具有的特异性作用

C.对不同脏器的选择性作用

D.药物对机体细胞间的初始反应