阿片类急性中毒后可出现（）、（）和（）三联征表现。
参考答案：呼吸抑制；昏迷；瞳孔缩小
.In order to prevent the fire spreading, some of the houses nearby _____before the firemen arrived.
A．have been pulled down
B．have pulled down
C．had been pulled down
D．had pulled down
患者，男，36岁。骤然剧烈腹痛5h，经检查诊断为十二指肠穿孔合并腹膜炎。现上腹部拒按，伴恶心呕吐，大便干结，小便短少，舌苔薄白，脉弦细数。其证型是
A．肝气郁结B．脾胃不和C．气血阻闭D．实热E．厥脱
