各道次轧制时间和间隙时间和相邻两根钢之间的空隙时间,称为轧制节奏。
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D类为380/220V低压网络供电电压,应每百台配电变压器至少设()个电压监测点。
A. 1个
B. 2个
C. 3个
轮周牵引力除去机车阻力消耗,实际作用在车钩上的机车牵引力称为()牵引力。
A. 黏着
B. 车钩
C. 指示
D. 柴油机
市区某企业自办的医院占用土地1000平方米,厂房占地2000平方米,该企业应纳城镇土地使用税税额为()(税率为8元/每平方米)。
A. 16000元
B. 24000元
C. 12000元
D. 18000元
A customer wants to have employees work from remote locations as well as in the office. All communications must be secure and files must be protected from access by unauthorized people. The employee’s applications (database inserts and reads) are only accessed with a web browser. Which of the following capabilities is necessary?()
A. SSL
B. PGP
C. File encryption program
D. Public key encryptio