【简答题】微生物菌种保藏的原理是设法创造一个优良的休眠条件,例如 __________、 __________、 __________、__________和__________等,使其代谢水平降低,乃至完全停止,达到半休眠或完全休眠的状态,从而减低菌种的变异率。
【简答题】概括有两种水平,即初级水平的 ( ) 和高级形式的 ( ) 。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【简答题】So _____ that even the people in the next room could hear him. A. loudly he spoke B. he spoke loudly C. loudly did he speak D. loudly spoke did he
【判断题】古代新郎结婚时会穿一套特制的衣服叫阙便服。()