此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.他积极参与了促进基督教各派大联合的运动。He was deeply involved in the ecumenical movement.雄...
Objective To assess the efficacy of low - dose Nifuda and Betaloc combination for essential hypertension.目的探讨伲福达和倍他乐克联合小剂量应用治疗原发性高血压病人的效果.Objective To observe the effect of captopril and betaloc on chronic congestive hea...
在局部地方白云石和硬石膏也是重要的胶结物;还有少量自生石英.Locally dolomite and anhydrite are important as cements , together with minor authigenic quartz.钱存在银行,利息自生.Money deposited in banks will accrue to us with interest.两种环境下形成的自生矿物组合截然不同.Authige...