Metabolic and residual rule of clenbuterol hydrochloride in creatural body .

盐酸克伦特罗在动物体内代谢与残留规律。

Of course , as for the questions in the breakdown of natural science , too uncommon and boring mathematical calculation can influence your activity , therefore I ask interesting and practical questions , such as creatural diesel oil , using of straw , recycle of rubbish , resource insect cultivation , as far as possible .

当然，对于自然科学版里的问题，太生僻、枯燥的数学计算会影响大家的积极性，所以我尽量提问有趣的、实用性较强的题目，譬如生物柴油、秸秆利用、白色污染以及垃圾回收、资源昆虫养殖等。