— are you going? —To the zoo.[ ]
A. Where
B. Who
C. Who's
答案:A
统计学表明穿刺哪根动脉的并发症发生率最低()
A.股动脉
B.肱动脉
C.腘动脉
D.桡动脉
E.颈动脉
燃气轮机的工作原理是什么?