To observe the acute toxicity and death of the mice to which calcium nanoparticles were given in maximal dose and obtain the lethal dose 50(LD50) or the maximal tolerance dose (MTD).
观察小鼠一日内给予大剂量钙纳米粒子的急性中毒及死亡情况，得出半数致死量（LD50）或最大耐受量（MTD）。
The dose of 50% M1 lethal was around 16KR when planted in North, and 20KR when planted in Hainan.
北方种植M1的半致死剂量为16KR左右，海南岛种植M1时可加大剂量至20KR。
The dose of 50% M1 lethal was around 16KR when planted in North, and 20KR when planted in Hainan.
北方种植M1的半致死剂量为16KR左右，海南岛种植M1时可加大剂量至20KR。
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