A.greater than 0.2%
B.less than 0.2%
C.greater than 2%
D.less than 2%
第1题
A、Chemical composition analysis
B、Phase analysis
C、Microstructure analysis
D、Testing for properties
第2题
______chemical analysis shows that water is made up of hydrogen and oxygen.
A.Prospective
B.Provocative
C.Qualitative
D.Quantitative
第3题
______ chemical analysis shows that water is made up of hydrogen and oxygen.
A.Prospective
B.Provocative
C.Qualitative
D.Quantitative
第4题
A.experiments
B.analysis
C.Synthesis
D.production
第5题
第6题
The age of prehistoric fossils can be determined by ______.
A.nuclear chemical analysis
B.data left with the fossils
C.reconstructing the skull
D.external evidence in the ground in which the fossil is found
第7题
How to check the taste?
A.By eating them.
B.By eating them and doing chemical analysis.
C.By doing chemical analysis
第8题
第9题
Which would be the major responsibility (责任,职责) of the chemical engineer?
A.direct research and development work
B.perform. chemical analysis (分析)
C.supervise (监督,指导) production work
D.direct other workers
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