水产动物是变温的无脊椎动物（软体动物、甲壳动物、棘皮动物）或鱼类，其遗传变异程度低于家畜等恒温的脊椎动物。
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"]
中共十三大正式制定了社会主义现代化建设“三步走”的战略部署。
Which two values are used by Spanning Tree Protocol to elect a root bridge?（） [" amount of RAM"," bridge priority"," IOS version"," IP address"," MAC address"," speed of the link"]
水产动物性染色体的主要决定类型分为XX-XY型、XX-XO型、ZW-ZZ型和ZO-ZZ型。
典型伤寒的极期临床表现有哪些？
