什么是电弧现象？
药品GMP认证可分为（）。 ["标准认证和安全认证","标准认证和企业认证","企业认证和计量认证","企业认证和品种认证"]
激发正能量需要（） ["改变认知习惯","学会感恩","挖掘积极行为","接受情绪，合理宣泄"]
Refer to the exhibit. OSPF has been configured on all routers in the network. However, router R1 does not receive a default route to router R2 as in tended. Which configuration change would ensure that R1 would receive a default route from R2? （） [" Add the area 1 stub command on routers R1."," Add the always keyword to the default - information originate configuration command on router R2."," Remov e the default information originate configuration command from router R2 and place it on router R1."," Add the ip route 5.0.0.0 255.255.255.0 0.0.0.0 command to router R2."]
瘤胃内的微生素可合成（） ["维生素D","维生素K","维生素C","维生素A"]
党员交纳党费的比例为：每月工资收入（税后）在3000元以下（含3000元）者，交纳月工资收入的（）；3000元以上至5000元（含5000元）者，交纳（）。
