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更多“Why are standard solutions of reductants less often used for titrations than standard solutions of o”相关的问题
第1题
Will mankind continue to live longer and have a higher quality of life？ In large measure the answer depends on technology and our ability to use it wisely. If we keep making progress as we have over the past fifty years, the answer is definitely yes. (82) The advancement of technology depends upon research and development, and the latest statistics show that the United States is continuing to pump billions of dollars annually into such efforts. So while we are running out of some scarce resources, we may well find technological substitutes for many of them through our research programs.
Therefore, in the final analysis the three major factors of production (land, labor, capital) are all influenced by technology. When we need new skills or techniques in machinery, people will start developing new technology to meet these needs. As equipment proves to be slow or inefficient, new machines will be invented. Technology responds to our needs in helping us maintain our standard of living.
What is the best title for the passage？
A．The Definition of Technology
B．Modern Technology
C．The Application of Technology
D．The Development of Technology
第4题
Syneresis refers to()
A．the expansion ofa hydrocolloid impression material when it takes in water
B．the contraction of a hydrocolloid impression material when it exudes water
C．the fact that the sol and gel temperatures ofthe hydrocolloid differ
D．the inclusion ofpowder in a hydrocolloid impression material
第8题
Freight consolidation is not a standard service.( )
