Our school is ______ a park and a big library. [ ]
A. between
B. next
C. across
D. in
答案:A
哪种节律是经皮心脏起搏的合适指征()
A.无症状性窦缓
B.高血压或中风患者的正常窦性心律
C.严重心脏阻滞伴肺水肿
D.6次或更多次电击除颤仍无收缩
E.一度房室传导阻滞
隧道防水可分为柔性防水和()。