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社会保险中最早出现的保险项目是（）。 A．养老保险 B．失业保险 C．医疗保险 D．生育保险

A.养老保险
B.失业保险
C.医疗保险
D.生育保险

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在阳台一侧或两侧地面处预埋直径32 mm镀锌钢管或塑料管作泄水管，水舌向外伸出至少80～100 mm，以利排水，排水坡度为（）。 A．0．5%～1% B．1%～2% C．0.5%～1.5% D．0.5%～2%

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B.Fail to reject Fail to reject Reject
C.Reject Reject Reject
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