门窗洞口先立门框的,砌砖时要离开框边()左右,不能顶死,防止门框受挤变形。
A,3mm
B. 5mm
C. 6mm
D. 10mm
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会计主体可以是一个企业,也可以是企业内部的某一单位或企业中的一个特定部分。
A. 正确
B. 错误
You are the network administrator for ExamSheet. You install a 16-bit ISA sound card on your Windows 2000 Professional computer. You have an unsigned device driver from the manufacturer of the sound card on a floppy disk. You install the device driver for the sound card. You restart the computer. During the startup process, the computer stops loading Windows 2000 Professional. You restart the computer and again the computer stops loading Windows 2000 Professional. You start the computer in safe mode. You want your computer to start properly. What should you do next? ()
A. Configure driver signing to prevent the installation of unsigned files.
B. On Control Panel selectSounds and Multimedia Devicesto remove the sound card drivers.
C. Use Device Manager to disable the sound card device.
D. UseSigverif.exeto find and delete all unsigned files.
食品工业常使用的微波装置的微波频率有()和2450MHz两种。