【多选题】In a business letter, which dates are correct?
【多选题】In a business letter, which dates are correct?
【判断题】永磁同步电机在正常工作时,转子的转速始终小于旋转磁场的转速。
【单选题】Which part can be omitted in a business letter?
【判断题】In a business letter, the subject heading is usually expressed in a sentence with a lot of details.
【多选题】In a business letter, which dates are correct?
【多选题】以下说法正确的是()。
A.
为了实现网络外部性,尽快达到临界容量,网络经济下的垄断厂商有足够的动力提价限产。
B.
网络经济下垄断并未消除竞争,企业垄断势力的获得实际上是竞争中优胜劣汰的结果,同时也是消费者选择的结果。
D.
数字产品的研发费用形成了资本沉淀,而且很难收回,因而具有沉淀性和专用性资产的特征。
【单选题】A proper complementary close in a business letter CANNOT be
【单选题】In a business letter, the _____ paragraph sets the tone and gives the impression of a company.