北山大剑
发表于 2018-1-10 18:53:29
看看的果皮
北山大剑
发表于 2018-1-10 18:53:37
看看的果皮去
北山大剑
发表于 2018-1-10 18:53:52
看看的果皮去
sfa1412
发表于 2018-1-10 19:28:33
感谢楼主发扬无私奉献的精神,分享精彩内容
ghl581844
发表于 2018-1-10 23:46:02
谢谢楼主分享
baway2015
发表于 2018-1-11 00:07:17
谢谢楼主分享
ggang68
发表于 2018-1-11 10:43:29
谢谢楼主分享。
sunway1999
发表于 2018-1-11 13:33:34
看看是不是真的
hczy888
发表于 2018-1-11 15:30:09
啊速读法精神多了副科级啊风口浪尖啊斯大林
moonjin22
发表于 2018-1-11 18:23:17
品软萌萝莉小仙 小女仆后插狐狸尾巴
674286583
发表于 2018-1-11 18:46:34
感谢楼主分享
674286583
发表于 2018-1-11 18:46:36
感谢楼主分享
cage911
发表于 2018-1-12 10:30:00
四级四级四级 重要的是说三遍
homanking
发表于 2018-1-12 20:18:49
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shenghuohao
发表于 2018-1-15 10:44:15
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luolikong21
发表于 2018-1-16 12:34:28
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hbzyg
发表于 2018-1-24 12:14:35
谢谢楼主分享
十号
发表于 2018-1-28 21:28:03
To prepare Zn–Fe–NO3, the method of co-precipitation was used
(Scheme 1). Zinc nitrate solution was mixed with an iron nitrate one
(4:1 molar ratio). Under constant stirring, a solution of sodium hydroxide (3.7 mol/L) was added slowly till the precipitation was completed.
The resulting precipitate was kept at 70±0.5 °C for 10 h. Then, it was
filtered and washed with bi-distilled water a number of times. Then,
the obtained precipitate was dried at 80±0.5 °C for 24 h
w360355553
发表于 2018-2-2 00:13:44
长啸当歌
发表于 2018-2-13 11:03:46
情色熊熊之熊麻吉泰