严重损伤容易并发感染的原因不包括（）
A.常并发休克
B.细菌污染
C.中性粒细胞功能降低
D.皮肤屏障功能破坏
E.骨髓增生受抑制
参考答案：E
测定巷道风流中的瓦斯和二氧化碳浓度时，都应当在巷道风流范围内进行测定。
—— What do you think of my speech? Being watched by so many people,
I always feel nervous.
—— You ______ quite well, though.
A．carried it off
B．carry it off
C．had carried it off
D．have carried it off
