单选题
发布日期:2021-08-27
although
even though
even if
as
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用中性氧化铝软板,以环己烷:丙酮为展开剂分离氨基蒽醌;用硅胶G硬板,80°C活化,以正丁醇-氨水-水为展开剂分离蒽醌磺酸,这两种方法是吸附层析还是分配层析?是正相层析还是反向层析?
司法鉴定管理实行()与()相结合的管理制度。
根据《水质 五日生化需氧量(BOD5)的测定稀释与接种法》(HJ 505—2009)测定水中BOD5时,水中的杀菌剂、有毒重金属或游离氯等会抑制生化作用,而藻类和硝化微生物也可能造成虚假的偏离结果。
Word2010中,下列格式化表格的方法正确的是()。
下列关于胸腹部按摩说法正确的是()。
进人老师办公室时,不能停留太久,但可以翻阅老师的资料。
生产期间使用的所有物料、中间产品或待包装产品的容器及主要设备、必要的操作室应当贴签标识或以其他方式标明生产中的产品或物料的(),如有必要,还应当标明生产工序。
在指定的电压u和i参考方向下,写出图所示各元件u和i的约束方程。(图片从左至右依次为1-5)
根据《票务管理规定》简述车站售票管理内容。
宏观调控的基本目标是什么?
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