呼吸道合胞病毒性肺炎()腺病毒性肺炎()
A．喘憋
B．稽留高热
C．两者均有
D．两者均无
参考答案：A,C
Look! The clock has stopped. Maybe there’s ________ wrong with it.
A．everything
B．something
C．anything
D．nothing
期距预测法是根据历史积累的资料，找出害虫自然种群各虫态或各世代之间的生长历期，时间间距的天数就叫做"期距"。
