更多"The purpose of the flame in flame a"的相关试题:
[单项选择]The purpose of the ashing step in graphite-furnace atomic-absorption spec-troscopy is to（）
A. Vaporize metal atoms to be analyzed
B. Cause the metal species to form carbides which are more volatile
C. Convert the graphite furnace to ash to avoid carbide formation
D. Burn off organic species that would interfere with the elemental analysis
[单项选择]The purpose of this ad campaign is to（）the prospective customers’interest in this latest model of ours.
A. appeal
B. encourage
C. arouse
D. attract
