【名词&注释】
孔隙率(porosity)、奉献精神(spirit of devotion)、抓住机遇(seize the opportunity)、岗位职责(post responsibility)、爱岗敬业(cherishing the job devotionally)、竞争上岗(competitive employment)、自流平砂浆(self-leveling mortar)、氩弧焊机(argon arc welding machine)、忠于职守(devotion to duty)、勤奋学习(assiduous learning)
[多选题]特种砂浆主要有()。
A. 绝热砂浆
B. 吸音砂浆
C. 膨胀砂浆
D. 自流平砂浆(self-leveling mortar)
E. 防射线砂浆
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