Mr. Zhang once taught in a remote village in Anhui province as a volunteer, which was ______ only on foot.

A．acceptable

B．accessible

C．available

D．appropriate

液体制剂的质量要求不包括( )

A．液体制剂要有一定的防腐能力
B．外用液体制剂应无刺激性
C．口服液体制剂外观良好，口感适宜
D．液体制剂应是澄明溶液
E．液体制剂浓度应准确，包装便于患者携带和用药