【单选题】The chairman of the company said that new techniques had _________ improved their production efficiency.
【单选题】在丙酮中含有少量乙醛,可用来鉴别乙醛存在的试剂是
【单选题】若在火场时衣服着火了,不正确的选项是( )。
【单选题】若在火场时衣服着火了,不正确的选项是( )
【单选题】According to the passage, investments in service are comparable to investments in production and distribution in terms of the ______.
A.
tangibility of the benefits that they tend to confer.
B.
increased revenues that they ultimately produce.
C.
basis on which they need to be weighed.
D.
insufficient ysis that managers devote to them.