We（）the distress signal on our own radio before the shore station relayed it to us.

A.received alreadly

B.have received

C.had received

D.was receiving

能促进脑细胞的氧化还原代谢，增加对糖类的利用，并能调节细胞代谢的药物是

A．尼可刹米

B．吡拉西坦(脑复康)

C．氨茶碱

D．甲氯芬酯(氯酯醒)

E．一叶秋碱