【判断题】为了防止发生人身触电事故和设备短路或接地故障,带电体之间、带电体与地面之间、带电体与其他设施之间、工作人员与带电体之间必须保持的最小空气间隙,称为安全距离。
【单选题】Windows7操作系统,由以下哪家公司开发()。
【判断题】为了防止发生人身触电事故和设备短路或接地故障,带电体之间,带电体与地面之间、带电体与其他设施之间、工作人员与带电体之间必须保持的最小空气隙,称为安全距离
【单选题】局部点缀,可弥补菜品因本身造型导致的( )状况。
【单选题】局部点缀,可弥补菜品因( )导致的不协调状况。
【单选题】We can infer that ______. A.there will be no distinction between micros and mainframes in the fut
A.
5.We can infer that ______. A.there will be no distinction between micros and mainframes in the future
B.
a future computer can use several CPUs to work for it at the same time
C.
the fifth generation computer will be produced within 2 years
D.
electronic computers will soon be out of date
【单选题】We can infer that ______.
A.
there will be no distinction between micros and mainframes in the future
B.
a future computer can use several CPUs to work for it at the same time
C.
the fifth generation computer will be produced within 2 years
D.
electronic computers will soon be out of date
【单选题】关于 Windows7的叙述中正确的是()。