射野挡铅的制作材料一般是（）_放射治疗物理学基础_全学科试题题库

当前学科：放射治疗物理学基础

题目：单选
射野挡铅的制作材料一般是（）
答案： <查看本题扣1积分>

查看答案

答案不对？请尝试站内搜索

推荐知识点:

什么叫碳弧气刨？

根据旅游者的访问目的，可将其划分为那些类型？分别有哪些基本特点？

The(1)means that the shipowner promises to carry on board a specific ship a particular cargo for a single or several voyages from one or more loading ports to one or more discharging ports. The payment paid by the charterer to the ship owner for cargo transport by sea is called(2)and the contact made by ship owner and charterer is called a voyage charter party. Under a voyage charter party, the actual operation of the vessel is left to the(3)There are the provision for the(4), demurrage and dispatch money etc. , in the voyage charter. There are more standard forms of voyage charter parties than any other form of contract of carriage.(5)is the most popular and widely used general purpose voyage charter party on a global basis for numerous types of cargoes.

低倍数泡沫的主要灭火机理是通过泡沫的（）作用，将燃烧液体与空气隔离实现灭火。

骨质疏松症在老年人中的发生率高达80%，WHO提出OP预防的三大原则是（）。

根据中国国家统计局的定义，国际游客包括（）。

原发性甲减者TSH升高为最早的改变。

拆卸与运输设备时，钻机在车盘上必须捆绑结实，可以超高或超长。

在土的颗粒级配曲线上出现一个台阶，表明土样()。