7.His time for the 100 meters ________the world record by one hundredth of a second. A: surpassed B: excelled at C: excelled D: surpassed in

Mechanical devices are occasionally used in marketing research. For example, ________ flashes an ad to a subject with an exposure interval that may range from one hundredth of a second to several seconds. After each exposure, the respondent describes everything he or she recalls.