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【单选题】
按照交易主体分类，京东商城的商业模式属于哪类？A.
B2B
B.
B2C
C.
C2C
D.
C2B
E.
G2C
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【简答题】请将这句话 The function of the lubrication system is to transport sufficient quantity and temperature appropriate cleansing oil to the all driving medium suce of friction constantly when engine is worki...
【简答题】硼酸是几元酸?其结构如何?为什么硼酸在热水中的溶解度比冷水中大?
【简答题】请把下面的句子翻译成汉语:The constituent parts of the human body are interdependent in function and mutually influential in pathology.
【简答题】请将下列段落翻译成中文 【1】One response to the rising costs of medical malpractice lawsuits has been the diversion of these cases from tort litigation to compulsory arbitration. Some states provide for mandatory ...
【简答题】请将该英文句子翻译成中文 The way we define current as i in Eq. (1-1) suggests that current need not be a constant-valued function, charge can vary with time in several ways that may be represented by different ki...
【简答题】人体眼液的渗透压在310K时约为770kPa。市售的某种眼药水由下列四种物质配制而成：5.00g ZnSO 4 ，17.00g H 3 BO 3 (硼酸)，0.20g盐酸小檗碱和0.008g盐酸普鲁卡因，它们溶于水并稀释到1000 mL。若设ZnSO 4 完全解离，硼酸是一元弱酸几乎不解离，小檗碱和普鲁卡因含量少忽略不计时，计算310K时该眼药水的渗透压是多少?比较考虑和不考虑活度系数的两种计算结...
【多选题】紫砂壶的主要特点是()。
A.
紫砂壶用以泡茶，能保持色、香、味不变
B.
泡茶不宜馊
C.
沸水急注不炸裂
D.
使用愈久，愈光润古雅，茶味愈醇香
E.
散热满，提携不烫手
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