塑料的性质主要取决于( )的性质。A.树脂 B.填料 C.增塑剂 D.着色剂 发布时间:2017-05-23 09:01 │ 来源:www.tikuol.com 题型:单项选择题 问题: 塑料的性质主要取决于( )的性质。A.树脂B.填料C.增塑剂D.着色剂
题型:单项选择题 0ne function of a hulwark is to().A.help keep the deck dryB.prevent stress concentrations on the stringer plateC.protect against twisting forces exerted on the frame of the vesselD.reinfo ce th eside stringers 查看答案