（）involves passing visible light transmitted through or reflected from the sample, through a single or multiple lenses to allow a magnified view of a sample.

答案：A.Optical microscopy
B.Digital microscopy
C.Scanning...

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问答题
Mass Spectrometry（MS）is the science of displaying the spectra of the masses of the（）comprising a sample of　material.
答案： A.atoms
B.molecules
C.ions
D.cations
正确答案：molecules
问答题
（）is a quantitative spectroscopic technique that measures the elemental composition, empirical formula, chemical state　and electronic state of the elements that exist within a material.
答案： A.XRD
B.EDS
C.IR
D.XPS
正确答案：XPS