Was it through Mary__________ was working at a high school_________ you got to know Bob?

A．who; who

B．who; that

C．that; that

D．that; where

具有首剂现象的抗高血压药物是

A．氢氯噻嗪
B．吲达帕胺
C．特拉唑嗪
D．普萘洛尔
E．卡维地洛