年龄在一岁以下，体重不超过9KG的婴幼儿应选用提篮式安全座椅，且必须将其方向安装，座

发布时间：2018-04-05 11:03 │ 来源：www.tikuol.com

题型：单项选择题

年龄在一岁以下，体重不超过9KG的婴幼儿应选用提篮式安全座椅，且必须将其方向安装，座椅的倾斜度应在（）。

A.45度～60度

B.60度～90度

C.30度～45度

D.90度～120度

题型：单项选择题

建筑物的经济寿命是指建筑物从建成之日起预期产生的收入等于其运营费用时的持续年数。( )

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题型：单项选择题

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