The factors which influenced somatic embryogenesis and plantlet regeneration in Picea meyeri Rehd. et Wils. were studied in order to establish a high frequency embryogenetic system.
摘要为建立白杄体

胎发生
其植株再生的
频率实验系统,对聚乙二

化处理的影响进行了系统研究。
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人-科技
英语 A study conducted at Washington University found that rats not only enjoy being tickled, but high frequency recordings showed that they actually make the same laughing sound during a good tickle session than when they play with other rats.
华盛顿大

项研究发现,老鼠不仅喜欢被

,而且高频率
录音表明,当它



时候,它
发出
笑声和与其他老鼠玩耍时发出
笑声是
样
。
60秒 2017年11月合集