【单选题】What should we do if there is anything wrong with the clothes we have baught within five days?
A.
Take the bill with you and get a refund.
C.
Buy another one again.
D.
Quarrel with the shop assistant
【单选题】有关电信交换系统的组成,下列说法错误的是:
A.
电信交换系统由信息传送子系统和控制子系统两大子系统组成。
B.
信息传送子系统由交换网络和接口两大部分组成。
C.
交换网络的接口可以分为模拟接口和数字接口两大类。
D.
现代交换系统的控制子系统普遍采用多处理机方式。
【单选题】The poor old consumer! He'd have to pay a great deal more if advertising didn't create mass market for products. It is precisely because of the heavy advertising that consumer goods are so cheap. But...
A.
to introduce their new functions.
B.
to compare them with new products of the same sort.
C.
to tell that they are still available
D.
to correct any impropriate information about them
【简答题】国内接待社旅游产品促销的时候,有哪几种促销方式?
【简答题】配合物[Cr(H 2 O)(en)(C 2 O 4 )(OH)]的命名(),配位原子是(),配位数()。
【简答题】下列配合物中,不存在旋光异构体的是 (A) [PtCl 2 (OH) 2 (NH 3 ) 2 ]; (B) K 3 [Cr(c 2 O 4 ) 3 ]; (C) [Co(en) 2 Cl 2 ]Cl; (D) [Co(en)(NH 3 ) 4 ]Cl 3 。
【简答题】配合物[Cr(OH)(C2O4)(en)(H2O)2]的名称是 ,配位数为 , 中心原子为 。
【多选题】旅游人员推销是指旅游企业利用人员对旅游产品进行推销的促销方式,这种促销的特点是()。
【单选题】配合物【Cr(H 2 O) 5 Cl】(OH) 2 ()