1.你知道电子的波函数和s,d4/四个量子数吗? 你知道H2O的结构吗?试绘出 3.你对“毒酒”和“毒大米”等食品问题是否感到恐慌? 原因? 4.对该课程的建议和要求
1. 你知道电子的波函数和s,p,d,f四个量子数吗？ 2. 你知道 H2O的结构吗？试绘出。 3. 你对“毒酒”和“毒大米”等食品问题是否感到恐慌？ 原因？ 4. 对该课程的建议和要求
从有机农业说起 org Org p y N ∥∥ Organic farming enters the mainstream Nature428,783(22Apri!2004)
Organic farming enters the mainstream Nature 428, 783 (22 April 2004) 从有机农业说起
速感 的5
ORGANIC FARMING. 1. Is it the future of farming? 2. Organic movement Avoiding synthetic fertilizers, pesticides and herbicides Organic standards also differ in their details from country to country Chilean nitrate, a mined source of sodium nitrate permitted under US rules Genetically modified (GM)?
ORGANIC FARMING: 1. Is it the future of farming? 2. Organic movement. Avoiding synthetic fertilizers, pesticides and herbicides. Organic standards also differ in their details from country to country. Chilean nitrate, a mined source of sodium nitrate, permitted under US rules Genetically modified (GM) ?
什么方法可以证明是 organic products? 1. Higher proportion of the isotope nitrogen-15 inorganically farmed soil In This is because nitrogen-fixing plants accumulate more of this heavy isotope than is present in synthetic fertilizers. 2. Investigating whether concentrations of trace elements such as calcium(Ca), boron(B), magnesium(Mg)and selenium(Se) differ between organic and conventional produce
什么方法可以证明是 organic products ？ 1. Higher proportion of the isotope nitrogen-15 inorganically farmed soil. 15N This is because nitrogen-fixing plants accumulate more of this heavy isotope than is present in synthetic fertilizers. 2. Investigating whether concentrations of trace elements such as calcium(Ca), boron(B), magnesium(Mg) and selenium(Se) differ between organic and conventional produce