【多选题】穴盘育苗时,常在基质中添加()作为营养。
【单选题】对于狭义信息资源管理理解错误的是( )。
A.
主要表现为对信息内容本身的开发和利用过程的管理。
C.
通过对信息源进行进一步分析,并经过信息的采集和转换、组织、存储、加工、检索和传递等环节,实现对信息资源的开发与利用。
【单选题】_________是X射线光子与物质相互作用中唯一不产生电离的过程。
【判断题】The author didn’t want to be one of
those people who felt regretted for not trying before when they died.
【单选题】The reason ______ they died was lack of medical care.
【单选题】More than half of the English settlers to Virginia died between 1606 and 1622. They died from (______).
【判断题】相干散射时X射线与物质发生相互作用中唯一不产生电离过程的