贵州省图集中自建砖混机房的设计室内外地坪高差为()。
A. 0.1米
B. 0.15米
C. 0.3米
D. 0.5米
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根据国家标准规定,普通硅酸盐水泥的初凝时间不得短于()min。
A. 30
B. 45
C. 1.5
D. 6.5
You configure parental controls on your computer for your childs user account. Your child logs on with a different account and is able to access inappropriate Web sites. You need to ensure that your child cannot access inappropriate Web sites. What should you do? ()
A. Enable Microsoft Windows Firewall.
B. Disable the default administrator account.
C. Use password protection for all user accounts.
D. Configure Web sites you approve of in the list of Trusted Sites of Microsoft Windows Internet Explorer.
铜接线管接续线时,将两头相向插入接线管内,并露出管外()mm,再用接线钳拧接。
A. 2
B. 3
C. 4
D. 5