可引起呼吸衰竭加重的是
A．机械通气过度 B．慢性呼吸衰竭合并休克 C．大量利尿剂 D．慢阻肺合并呼吸道感染 E．应用强心剂
参考答案：D
□500÷6，要使商是三位数，□里最大应填______；要使商是四位数，□里最小应填______．
–You look so happy in this photo!—This photo __________ on my last birthday.
A. took B. takes C. was taken
