His subject is ______. [ ]
A. swims
B. swim
C. swiming
D. swimming
答案：D
Jin Yong is one of the greatest and oldest _______ writers. He is still ______.
A．living; alive
B．living; living
C．alive; living
D．alive; alive
肝外伤后胃肠道出血是由于
A．应激性溃疡
B．消化性溃疡的激活
C．合并肠损伤
D．合并胆道损伤，血管与胆管相通
E．低凝血酶原水平
