【单选题】人民解放军解放南京的时间是1949年( )
【判断题】啮虫目、半翅目、双翅目及膜翅目的种类在储藏物中大多属于寄生或捕食其他害虫的天敌昆虫
【单选题】The numbers that researchers get from the experiments can be _______, just like number puzzles.
【单选题】________ enough time and money, the researchers would have been able to discover more in this field. ( 1998)
【单选题】与冠状动脉粥样硬化的形成关系最密切的因素是: