单项选择题下列对于普通话概念的表述正确的是: A、以北方语音为标准音 B、以北京话为基础方言 C、以典范的白话文著作为语法规范 D、是现代汉民族共同语
单项选择题伦人的生命包很稳定是由于它的第三层最大的特点是亲属成员至高无上。
单项选择题In which sentence, the meaning of “be hand in glove with” is different from that in other sentences? A、They hope to be hand in glove with the investors to solve the problems. B、He was found to be hand in glove with the enemy. C、Several high-ranking diplomats were found to be hand in glove with enemy agents. D、Every official is hand in glove with him.
单项选择题如果上游工厂污染了下游居民的饮水,按科斯定律( ),问题即可以妥善地解决。 A、不管财产权是否明确,只要交易成本为零。 B、只要财产权明确,且交易成本为零。 C、只要财产权明确,不管交易成本有多大 D、不论财产权是否明确,交易成本是否为零
多项选择题下列哪些是网店产品常用的定价策略 A. 折扣定价 B. 买赠定价 C. 预售定价 D. 套餐组合定价