下面语句Dim arr（3 To 5，-2 To 2）定义的数组的元素个数是（） ["20","12","15","24"]
Hot gas defrosting uses the hot gas from （） to defrost the evaporator. ["starting air bottles","diesel engines","boilers","refrigeration compressor"]
个人消费者的购买行为类型包括（）。 ["习惯型购买","多样型购买","专业型购买","协调型购买","复杂型购买"]
等值（）万元人民币以下的大额取现业务由柜面业务储蓄主管审批。 ["100","200","300","500"]
The purpose of inert gas systems aboard tank vessels is to（）. ["allow sufficient oxygen in the tank to sustain life","prevent outside air from entering the tank","provide increase in cargo discharge pressure","comply with double hull pollution prevention regulatio"]
简述肠袋虫病的症状核病理变化。
