根据《建筑排水塑料管道工程技术规程》CJJT29的定义,公称直径表示()尺寸的名义值。
参考答案:管材直径
The man pulled out a gold watch, _________ were made of small diamonds.
A.the hands of whom
B.whom the hands of
C.which the hands of
D.the hands of which
谢丽休产假期间,其工资照发。企业的这笔费用支出属于人力资源
A.使用成本
B.保障成本
C.离职成本
D.开发成本