引起婴幼儿腹泻最常见的病毒是() ["A组轮状病毒","B组轮状病毒","C组轮状病毒","肠道病毒68型","以上都不是"]
下列各项属病理性增生与肥大的是()。 ["妊娠期子宫肥大","哺乳期乳腺肥大","高血压引起的心肌肥大","运动员的肌肉肥大","长期体力劳动者的心室肥大"]
最常见下列哪种乳腺癌类型?() ["黏液癌","导管内癌","乳头状癌","髓样癌","浸润性导管癌"]
cDNA基因克隆采用的模板为()。 ["DNA","mRNA","rRNA","tRNA","ScRNA"]
宴会厅的室温要保持稳定,冬季保持在20℃-24℃之间,夏季保持在()。 ["18℃-22℃","20℃-24℃","C.22℃-26℃","24℃-28℃"]
何谓净现值?何谓净现值率?二者的评价准则是什么?