反应器一、二级旋分器料腿均采用（） 蝶阀。 翼阀。 塞阀。 滑阀。
Select the action that results from executing these commands. Switch（config-if）# switchport port-security. Switch（config-if）# switchport port-security mac-address sticky（） A dynamically learned MAC address is saved in the startup-configuration file.。 A dynamically learned MAC address is saved in the running-configuration file.。 A dynamically learned MAC address is saved in the VLAN database.。 Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.。 Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.。
《中华人民共和国仲裁法》规定，当事人申请撤销裁决的，应当自收到裁决书之日起（）内提出。 A.二个月 。 B.六个月 。 C.四个月 。 D.五个月。
汽车传动系按结构和传动介质不同，传动系可分为（）等 机械式。 液力机械式。 静液式。 电力式。
Which description about asymmetric encryption algorithms is correct？（） They use the same key for encryption and decryption of data.。 They use different keys for decryption but the same key for encryption of data.。 They use different keys for encryption and decryption of data.。 They use the same key for decryption but different keys for encryption of data.。
（）是反映客观现实的一种思想，是对研究对象有所断定的一种思维方式。
