肺泡和细支气管腔内充满不可溶性富磷脂蛋白质物质的疾病是
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主成分分析中,计算贡献率和累计贡献率是为了确定主成分(即综合指标)的个数,并据此建立主成分方程。()
A. 正确
B. 错误
A.Call a taxi for the woman.B.Ride a horse with the woman.C.Take the woman m the bus s
A. Call a taxi for the woman.
B. Ride a horse with the woman.
C. Take the woman m the bus station.
Drive the woman to the train station.
【B12】
A. own
B. 真
C. second
D. real