孕几周是胎儿股骨长度的最易测量时间() ["A．9～12周","B．14～22周","C．24～28周","D．32～36周","E．37～40周"]
孕几周超声可清楚显示胎儿膀胱() ["A．9周","B．12周","C．15周","D．20周","E．8周"]
弓形虫病
弓形虫的三种形态包括__________、__________和__________。
预防弓形虫病传播的措施主要有______________、________________、_________________、_________________、__________________。
假囊
