单选题：UHPC exhibits excellent rheological behaviors, improved in mechanical and ( ) performance with very high compressive strength, and non-brittleness behavior.
单词 “set” 用于水泥材料，指的是 ( )。
The metals and ceramics have a similar structural feature on the atomic scale: they are ( ), which means that their constituent atoms are stacked together in a regular, repeating pattern.
In a glass, short-range order is retained, long-range order is ( ).
The central feature of crystalline structure is that it is regular and ( ).
Ferroelectricity of donor-doped barium titanate ceramics is lost at a certain temperature, and this temperature is called ( ).
A silicon crystal doped with boron creates a p-type semiconductor. This doping is known as ( ).
In a solid solution, solute atoms substitute for lattice atoms. This solid solution is ( ).
Ferroelectricity of donor-doped barium titanate ceramics is lost at a certain temperature, and this temperature is called ( ).
The raw materials are mixed thoroughly and then sintered ( ) a temperature of 1400 ℃ in a kiln.
表示 “不含铅” 或 “无铅的” 意思的词是 ( )。
A silicon crystal doped with boron creates a p-type semiconductor. This doping is known as ( ).
In a solid solution, solute atoms substitute for lattice atoms. This solid solution is ( ).
判断题：Keeping the amount of waste, especially toxic waste that may result from processing of the original product, to a minimum should be the first step.
判断题：Glass is obtained by cooling a melt slowly.