每个换流阀中必须增加一定数量的晶闸管级。各阀中的冗余晶闸管级数，应不小于12个月运行周期内损坏的晶闸管级数的期望值的2.5倍，也不应少于（）晶闸管级。 ["1个；","1～2个；","2～3个；","3～5个。"]
等长运动
Voice activity detection （VAD） suppresses the transmission of silence patterns. On average， and assuming that a link carries at least 24 calls， what percentage of total bandwidth could VAD save？（） ["5","15","25","35","45","55"]
町人物是指？（） ["情爱小说","官场小说","经济小说","科幻小说"]
金融制度具体包括（） ["政府管理","管理汇率制度","产品价格制度","银行制度","利率制度"]
什么是间色、复色和补色？
