The clinker product of Portland cement need to add gypsum to（）the（）process. 正确答案：retard setting

Unlike crystals, glasses do not have well defined melting points, but exhibit a（）Tg. 正确答案：glass transition temperature

Glasses are（）, not（）at all. 正确答案：amorphous crystalline

The hot step of ceramic processing, in which the green compact is first subjected to heat to（）up any liquid phase formed during the processing and then subjected to higher heating, known as firing, sintering, or（）. 正确答案：dry densification

Two common shaping techniques are utilized for forming clay-based compositions:（）and（） 正确答案：hydroplastic forming slip casting

Ceramics are, by nature, generally porous materials with varying degrees of（）. 正确答案：porosity

White cement is achieved by decreasing the ratio of Al2O3 to Fe2O3 in the raw materials. A.正确B.错误 正确答案：错误

Many glasses are electrolytic conductors at elevated temperatures. A.正确B.错误 正确答案：正确

The surface tension　implies the energy needed to create a unit area of the surface, and the surface energy means the force acting on a unit distance in the surface. A.正确B.错误 正确答案：错误

For advanced ceramic, what is new are the many processes developed in recent years to produce them. A.正确B.错误 正确答案：正确

The silicate structures can link by sharing the atoms in three corners of the SiO4 tetrahedrons, forming chain or ring structures. A.正确B.错误 正确答案：错误

The product methods of the rapid-hardening Portland cements include（） A.adding gypsumB.increasing the alite contentC.finer grinding of the clinkerD.finer grinding or better mixing of the raw materials 正确答案：increasing the alite content；finer grinding of the clinker；finer grinding … 阅读详情>> "The product methods of the rapid-hardening Portland cements include（）"