The credit card, an American innovation, first gained national【48】in 1938【49】oil companies selling gasoline to【50】set up a national pool to honor each other's cards. Rapid growth,【51】, was not possible【52】the mid-1950's,when the development of electronic computers【53】fast, accurate billing and accounting. Department stores, airlines, banks, and other enterprises then entered the【54】and now offer credit to【55】140 million card owners.
(46)
A.mean
B.means
C.methods
D.ways
A.Electricity Commerce
B.Electronic Commerce
C.Electronic Communication
D.Electronic Conference
A ______ achievement of electronics is the electronic computer.
A.widely knowing
B.being widely known
C.widely known
D.having widely known
Electronic brains can reduce the profusion of dead ends______(involve)in vital research.
This forecast predicts______.
A. records will be broken
B. skies will be partly cloudy on Sunday and Monday
C. there will be no rain in the forecasted period
D. temperatures will be lower than normal for the time of year
__________,we keep records oil all the experiments so that we may have enough data.
A.As a whole
B.As a rule
C.On the average
D.By all means
records for these who live _10_ them
A.before
B.after
C.later
D.for
__________ .the new electronic device they designed is nOW in regular peration.
A.With the solved problem
B.With this problem being.Solved
C.With the problem solved
D.With this problem to solve
A.contributed to
B.amounted to
C.headed for
D.consisted of