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【单选题】
按照中国证监会发布的《创业板上市公司证券发行管理暂行办法》,下列创业板上市公司发行股票不需满足的条件的是( )。
A.
最近两年按照上市公司的章程的规定实施现金分红
B.
最近三年及一期财务报表未被注册会计师出具否定意见或者无法表示意见的审计报告
C.
最近一期末资产负债表高于５０％
D.
上市公司最近十二个月内不存在违规对外提供担保或者资金被上市公司控股股东、实际控制人及其控制的其他企业以借款、代偿债务、代垫款项或者其他方式占用的情形
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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
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
【单选题】Unlike affixes, ( ) are often free morphemes.
A.
suffixes
B.
prefixes
C.
inflectional morphemes
D.
roots
查看完整题目与答案
【单选题】The core component in the gas chromatography is ( ).
A.
the detector
B.
the column
C.
the sample injection system
D.
the monochromator
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
【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】______ 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
【单选题】Unlike affixes, ( ) are often free morphemes.
A.
suffixes
B.
prefixes
C.
inflectional morphemes
D.
roots
查看完整题目与答案
【单选题】The core component in the gas chromatography is ( ).
A.
the detector
B.
the column
C.
the sample injection system
D.
the monochromator
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
【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】______ 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