中国大学MOOC: Analysis of its spectrum can tell not only __________ atoms or molecules a substance is composed, but ___________ relative amounts they are present.
举一反三
- Compounds composed of molecules (molecular compounds) usually contain only elements.
- 中国大学MOOC: The present tense does not only mean what is true now. It can also refer to events in the past and the future.
- Maybe Ma Yun hasn’t expected that Alibaba can _____ its present position in e-commerce within only 15 years.
- 中国大学MOOC: _________ present the structure of an organization and the relationships between its different parts.
- A laser can be best described by______. A: a device for stimulating atoms and molecules to emit light B: an atom in a high energy state C: a technique for destroying atom or molecules D: an instrument for measuring light waves