关于精神发育迟滞，叙述不正确的是（） ["是指精神发育不全或受阻的一组综合征","特征为智能低下、社会适应困难","起病于发育成熟（18岁）以前","本病只单独出现","由生物、心理、社会因素所致"]
Where can you obtain information about full database backup set created using RMAN， if the control file was used as the repository？（） ["V$BACKUPSET","RC_DATABASE","V$BACKUP_SET","RC_BACKUP_SET"]
犯罪原因与犯罪条件的区别。
曾经在公元前作过重要都城的城市是（）。 ["北京、南京、西安、开封","西安、洛阳、开封、杭州","西安、洛阳、开封、南京","开封、西安、洛阳、北京"]
Refer to the exhibit. The Linksys router in the diagram is performing pNAT (port network address translation). What hash algorithm should you choose and why?（） ["Use hash MD5 to ensure that IKE works through NAT. ","Use ah-sha-hmac, as it does not check the integrity of the IP header. The IP header will change due to NAT. ","Use 3DES, as it will encrypt the IPSec header IP addresses and bypass addressing issues. ","Use esp-sha-hmac, as it does not check the integrity of the IP header. The IP header will change due to NAT."]
公共交通运营必须具备的能力包括：①输送能力；②（）；③应变能力
