What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （） No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency。 The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received。 The Operator should immediately set continuous watch on VHF channel 70。 The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received。
南昌寓“南方昌盛”、“昌大南疆”之意。南昌城名数易，别名诸多。下列城名中，哪个不是历史上的南昌的别名？（） 豫章。 洪州。 隆兴。 昌平。
新时期中小学思想道德教育中德育的目标追求是：（） 学会做人。 学会学习。 学会选择。
格式条款不得含有免除经营者下列哪些责任的内容？（） A.造成消费者人身伤害的责任。 B.因一般过失造成消费者财产损失的责任。 C.对提供的商品或者服务的法定保证责任。 D.违约责任。
下列表现（）属于善行数变的特性。 动摇不定。 易出汗。 易伤人上部。 病位游走。
关于3G2G漫游和切换，以下说法错误的是（）。
