chlorophyll appears green to our eyes because it absorbs light in the green part of the spectrum.
plant absorb the element nitrogen in the form of .
百分比一致性指标是指用同一测验或两平行测验先后多次施测，其对被试的分类结果一致的比例。()
rapid growth of industries was headed by a collection of colorful and energetic tycoons who were know as “captains of industries” or “robber barons”. the following are the examples except for
结构效度的验证的步骤一般包括()。
o2 balance in n-fixation process is achieved by a molecular; which is .
diffusion is a directed movement from a region of high concentration to a lower concentration.
are the traditional source of funding for both republican and democratic parties, so interest groups employ influence on political parties through campaign finance.
琶音一般是由音阶中的哪几个音构成？
the dried seeds absorb water mainly through , which greatly depends on the value of .