... …………… .of light from any sharp spectral line The standard meter in France has been …………… in terms of the number of wavelengths of light of a certain …………….line Exercise 3: Decide whether each of ... the time; Note that, as for before and after, they can not only function as conjunctions of time but also as prepositions of time: a He jumped to the conclusion before any of his classmates b He ... development of federal standards for automatic data processing techniques, for computer equipment, and for computer languages 10 ……………some atoms combine to form solids, one or more electrons are often...