用带正电荷的载体制备固定化酶后，酶的最适pH（）。 ["向碱性一侧移动","向酸性一侧移动","不改变","不确定"]
If no metric is specified for the routes being redistributed into IS-IS， what metric value is assigned to the routes？（） ["0","1","10","20"]
线路的预防性维护是（）。 ["对线路的停电检修","处理故障与事故","针对线路有可能发生的故障和事故进行不停电维护","针对线路有可能发生的故障和事故采取的防范措施"]
In which tunnel-less VPN topology do group members register with a key server in order to receivethe security association necessary to communicate with the group？（） [" Easy VPN"," GRE tunneling"," Virtual Tunnel Interfaces"," Dynamic Multipoint VPN"," Group Encrypted Transport VPN"]
在侦查过程中，发现有不应对犯罪嫌疑人追究刑事责任的情况时，侦查机关应当如何处理？（） ["撤销案件","中止诉讼","释放已被逮捕的犯罪嫌疑人，并发给释放证明","公安机关释放被逮捕的犯罪嫌疑人的，应通知原批准的人民检察院"]
石油的化学组成
