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基因调控是在多水平上进行的,目前认为基因调控主要发生在()。
在日本初次见面时的问候礼和告别礼应该分别鞠躬多少度?
黑素细胞
某小班优势树种为苹果,进入冬季经实测郁闭度为0.17,该小班应划为()小班。
皮褶厚度
为了便于结算,一个单位可以同时在几家金融机构开立银行基本存款账户。( )
安全评价的主要目的是运用安全系统工程的原理和方法,识别和评价系统中存在的危险、有害因素。在进行安全评价时,通常要选用不同的安全评价方法。安全评价的方法很多,常用的分类方法有()。
对于“小e安全检测”说法正确的是:()
商品流通企业信息管理中的计算机管理方式,按应用计算机进行信息管理程度的不同,可分为( )等情况。
动物不能在体内合成维生素C。
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