【名词&注释】
技术规范(technical specification)、水泥砂浆(cement mortar)、严格要求(strict demands)、混凝土外加剂(concrete admixture)、相结合(combination)、落叶乔木(deciduous arbors)、有关规定(related regulations)、外加剂应用(application of admixture)、同步进行(carried out simultaneously)、适用于(suitable for)
[单选题]根据《混凝土外加剂应用(application of admixture)技术规范》有关规定(related regulations),低温施工时,终凝时间不得大于()h。
A. 10
B. 12
C. 13
D. 15