委托第三方调查的信息可能很有价值，但缺点是费用太高。
查看答案
Each hose used for transferring vapors must（）.
A. have a design burst pressure of at least 25 psig
B. be capable of withstanding at least 2.0 psi vacuum without collapsing or constricting
C. be electrically continuous with a maximum resistance of ten thousand ohms
D. All of the above
施工项目部在项目分包队伍的安全管理工作包括哪些内容？
微信支付 
支付宝支付