Can you make sure ______ the gold medal?

A．where Maria had put

B．where had Maria put

C．where has Maria put

D．where Maria has put

破伤风病人，气管切开的指征主要是

A．呼吸中枢麻痹
B．肺部感染
C．抽搐频繁，而又不易用药控制
D．吞咽困难，防止食物误吸
E．腹直肌强直，呼吸受限