—______ you pass the examination on the first attempt?

—Of course. You know, I have been preparing for it for a long time.

A．Can

B．May

C．Shall

D．Could

关于血压的生理性变化正确的是()

A．同年龄组的女性低于男性

B．小儿低于成人

C．清晨高于傍晚

D．左上肢高于右上肢

E．下肢高于上肢