GB/T2539规定,测定石蜡熔点时重复测定两个结果之间最大差值不得超过()℃。
A. 0.01
B. 0.05
C. 0.1
D. 0.5
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挖台阶宽度、高度应符合设计要求,沿线路纵向挖台阶的宽度不应小于()m。
An organization called contoso.com has Exchange Server 2010.@contoso.com e-mail address suffix. Anonymous and Authorization user can post to a Public Folder named Folder1 by sending e-mail messages to folder1@contoso.com.You need to prevent all users from posting content to folder 1, by sending e-mail.How should you do this?()
A. Default receive connector
B. Public folder management console
Creating Transport Protection Rules
D. In Exchange Management Console, modify properties of Public Folder database.
圆线同心绞,当中心绞层单线根数为4根时,再绞2层,其单线总根数为()根。
A. 27
B. 28
C. 29
D. 30
制冷剂罐应该保存在()0C以下的环境中,储存在干燥、阴凉、通风的库房中。