如果一批出境货物超过检验检疫有效期限，此时报检人应（） ["向检验检疫机构申请延长有效期","重新报检","立即装船出运","自行更改有效期"]
下面关于问题点说法错误的是（）。 ["在产品非常复杂的情况下，最好直接使用明显性问题解决","可以带给销售代表拜访向深度进展的线索","依赖于销售代表的产品或服务解决的问题而定的","问题点是隐藏在客户谈话中"]
关于基因显性有如下几种说法，正确的是（） ["等位基因之间的显性关系因环境因素的影响而改变，这称为条件显性","F1的性状表现超过亲本性状，叫共显性","F1同时表现出双亲本性状的遗传现象，称超显性","镶嵌显性是指双亲性状在F1的同一个体不同的部位表现出来，这种双亲的性状不一定有显隐性之分"]
When two different metals are joined to form a closed circuit and exposed to different temperatures at their junctions （） which can be used to measure temperature. ["a current will flow","a power will develop","a heat will flow","a pressure will produce"]
The “horse latitudes” are regions of（）. ["brisk prevailing winds","light airs and calms","abundant blue sea grass vegetation","None of the above"]
电力系统事故的主要形式有哪些？
