【判断题】Language, a very powerful, complicated mechanism, is the most common method of communication.
【简答题】聚甲基丙烯酸甲酯是一种重要的医用高分子材料,用于人造骨、关节等。已知烯烃可被KMnO 4 酸性溶液氧化成二元醇,如CH 2 =CH 2 HOCH 2 CH 2 OH 现以甲基丙烯为原料合成有机玻璃树脂,流程如下。请在下列方框中填入合适的有机物结构简式。
【判断题】A very common method of digital operation is achieved by using current pulses.
【单选题】People have given up pictographic method to create new characters. However, it is very common to use a pictographic character as a ______ in the creation of compound characters.
【单选题】Odd pricing method is a common retail tactic which ___________.
A.
is often used with very expensive items
B.
is only effective on potential car customers
C.
is the most popular way of pricing a product
D.
is the most effective way of selling low priced products
【单选题】如果旅游团和琪领队提出对活动日程做重大修改的要求,并可能导致旅游接待计划发生较大变动或涉及接待规格的变动,原则上地陪应予()
【单选题】如果旅游团 ( 者 ) 或其领队提出对活动日程做重大修改的要求,并可能导致旅游 接待计划发生较大变动或涉及接待规格的变动,地陪应()。
【单选题】如果旅游团提出对活动日程做较大修改,并可能导致旅游接待计划发生较大变动或涉及接待的规格变动,原则上应( )。