开放性胸外伤的诊断依据是：（）
A．仅胸壁有创口
B．支气管断裂
C．多发性肋骨骨折
D．胸壁有创口并伴有呼吸困难、紫绀及休克
参考答案：D
Mary never does any reading in the evening, _____. [ ]
A. so does John
B. John does too
C. John doesn't too
D. nor does John
邮寄物入境后，由检验检疫人员实施现场检疫。（）
