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【简答题】
写作练习 1. 每个人专属自己的特殊代码,就是姓名。每一个人的姓名都可以有个性化的诠释。请你结合自己姓名的特点,做一个特殊的诠释,用于今后的自我介绍中。 2. 写一篇自我介绍稿,同学、新老师介绍自己。注意突出你的性格、爱好等 3. 根据自己的情况和身边同学的评价,写一写自己,向别人展示一个真实的你。写完以后再加个题目,如《我给自己画张像》、《这就是我》、《爱哭鼻子的女孩》......,突出个人特点。 4. 学校学生会将进行招新工作,请根据自己的特长,写一份应聘式的自我介绍稿。注意突出自己的特长和应聘优势。
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【单选题】In the gas chromatography, the adjusted retention time would reflect the interactions between ( )
A.
the component and the carrier gas
B.
the component and the stationary phase
C.
the components in the sample
D.
the carrier gas and the stationary phase
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【单选题】Which of the following is NOT true?
A.
Roots are not necessarily free morphemes.
B.
Bound morphemes are always affixes.
C.
All free morphemes are roots.
D.
All affixes are bound morphemes.
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【简答题】Programmed temperature gas chromatography中文是()
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【多选题】Write down basic principles and applications of gas chromatography, high-performance liquid chromatography and capillary electrophoresis.
A.
CE: separations of large organic species on the basis of their rate of migration through a medium under the effect of an electrical gradient, which is determined by the mass and charge of the species, the permeability of the supporting medium, and of course the magnitude of the electrical gradient. Hence species can often be separated on the basis of differences with regard to these characteristics. Better resolution than for similar HPLC separations can thus be obtained. Detection of the eluted components is typically achieved using detectors based on molecular spectrometry.
B.
Gas chromatography: To provide the higher resolutions required by modern analyses, the use of long, small diameter capillary columns is the norm. Contemporary GC analysis of trace organic materials uses open tubular capillary columns where a liquid phase has been bound to the internal wall.
C.
HPLC is almost exclusively performed in the reverse phase mode (RP-HPLC), using stationary phases of silica gel derivatised with silylated aliphatic hydrocarbons such as octasilyl (C-8) and octadecylsilyl (ODS) moieties. These are used in conjunction with mobile phases that are predominantly aqueous. HPLC is of most utility where the organic analytes have a large molecular mass, and hence have low volatility, and where the molecule is polar or contains many polar substituents.
D.
Atomic absorption spectrometry (flame or electrothermal) (AAS, ET-AAS), atomic fluorescence spectrometry (AFS), inductively coupled plasma optical (or atomic) emission spectrometry (ICP-OES or ICP-AES), neutron activation analysis (NAA), X-ray fluorescence (XRF), proton-induced X-ray emission (PIXE), spark source or isotope dilution mass spectrometry (SSMS, IDMS), electrochemical (anodic stripping voltammetry and polarography) or inductively coupled plasma-mass spectrometry (ICP-MS).
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【单选题】In gas chromatography, the ______responds to analytes containing oxidizable carbon atoms such as hydrocarbons.
A.
injection system
B.
flame ionization detector
C.
column system
D.
carrier gas
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【简答题】英译中:capillary column gas chromatography
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【单选题】The distinction between free morpheme and bound morpheme is whether morphemes can be other morphemes.
A.
connected to
B.
independent of
C.
supplemented to
D.
reliable on
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【判断题】“福利刚性”专指人们对于自己的福利待遇具有允许其在一定范围内上下波动的心理预期
A.
正确
B.
错误
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【单选题】In the gas-liquid chromatography, the stationary phase in the column is ( )
A.
the general solid substance
B.
the solid adsorbent
C.
the support
D.
the support and the stationary liquid
查看完整题目与答案
【单选题】______ can be used independently without being combined with other morphemes.
A.
Free morphemes
B.
Bound morphemes
C.
Affixes
D.
Roots
查看完整题目与答案
相关题目：
【单选题】In the gas chromatography, the adjusted retention time would reflect the interactions between ( )
A.
the component and the carrier gas
B.
the component and the stationary phase
C.
the components in the sample
D.
the carrier gas and the stationary phase
查看完整题目与答案
【单选题】Which of the following is NOT true?
A.
Roots are not necessarily free morphemes.
B.
Bound morphemes are always affixes.
C.
All free morphemes are roots.
D.
All affixes are bound morphemes.
查看完整题目与答案
【简答题】Programmed temperature gas chromatography中文是()
查看完整题目与答案
【多选题】Write down basic principles and applications of gas chromatography, high-performance liquid chromatography and capillary electrophoresis.
A.
CE: separations of large organic species on the basis of their rate of migration through a medium under the effect of an electrical gradient, which is determined by the mass and charge of the species, the permeability of the supporting medium, and of course the magnitude of the electrical gradient. Hence species can often be separated on the basis of differences with regard to these characteristics. Better resolution than for similar HPLC separations can thus be obtained. Detection of the eluted components is typically achieved using detectors based on molecular spectrometry.
B.
Gas chromatography: To provide the higher resolutions required by modern analyses, the use of long, small diameter capillary columns is the norm. Contemporary GC analysis of trace organic materials uses open tubular capillary columns where a liquid phase has been bound to the internal wall.
C.
HPLC is almost exclusively performed in the reverse phase mode (RP-HPLC), using stationary phases of silica gel derivatised with silylated aliphatic hydrocarbons such as octasilyl (C-8) and octadecylsilyl (ODS) moieties. These are used in conjunction with mobile phases that are predominantly aqueous. HPLC is of most utility where the organic analytes have a large molecular mass, and hence have low volatility, and where the molecule is polar or contains many polar substituents.
D.
Atomic absorption spectrometry (flame or electrothermal) (AAS, ET-AAS), atomic fluorescence spectrometry (AFS), inductively coupled plasma optical (or atomic) emission spectrometry (ICP-OES or ICP-AES), neutron activation analysis (NAA), X-ray fluorescence (XRF), proton-induced X-ray emission (PIXE), spark source or isotope dilution mass spectrometry (SSMS, IDMS), electrochemical (anodic stripping voltammetry and polarography) or inductively coupled plasma-mass spectrometry (ICP-MS).
查看完整题目与答案
【单选题】In gas chromatography, the ______responds to analytes containing oxidizable carbon atoms such as hydrocarbons.
A.
injection system
B.
flame ionization detector
C.
column system
D.
carrier gas
查看完整题目与答案
【简答题】英译中:capillary column gas chromatography
查看完整题目与答案
【单选题】The distinction between free morpheme and bound morpheme is whether morphemes can be other morphemes.
A.
connected to
B.
independent of
C.
supplemented to
D.
reliable on
查看完整题目与答案
【判断题】“福利刚性”专指人们对于自己的福利待遇具有允许其在一定范围内上下波动的心理预期
A.
正确
B.
错误
查看完整题目与答案
【单选题】In the gas-liquid chromatography, the stationary phase in the column is ( )
A.
the general solid substance
B.
the solid adsorbent
C.
the support
D.
the support and the stationary liquid
查看完整题目与答案
【单选题】______ can be used independently without being combined with other morphemes.
A.
Free morphemes
B.
Bound morphemes
C.
Affixes
D.
Roots
查看完整题目与答案