下列各组线段不能构成直角三角形的是[ ]
A．3，4，5
B．6，8，10
C．3，6，7
D．5，12，13
答案：C
At the seventh International Ballet Competitions , Fernando Bujones won the first gold medal ever _____to an American male dancer .
A．awarded
B．to be award
C．being awarded
D．should be awarding
pH值升高、paCO 2降低为( )
A．代偿性呼吸性酸中毒B．失代偿性呼吸性酸中毒C．呼吸性酸中毒并发代谢性酸中毒D．呼吸性酸中毒并发代谢性碱中毒E．呼吸性碱中毒
