题目:
按照材料性质划分,常见建筑构件可分为()
A.钢结构
B.混凝土
C.塑料
D.木材
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B解析:Decreased PaO2 indicates hypoxemia, which is a universal finding in ARDS. The PaO2 level is low early in the disease due to hyperventilation and then eleva...