41.   The odds are three times higher than normal when the mothers work nights, said the study by University of Maryland sociologist Harriet B. Presser.

42.   The newcomers lacked skills and education for the job market, said the study.

43.   The National Cancer Institute says preliminary studies of ultrafast CT show promise in detecting small cancers.

44.   The rest of the increase was attributed to a shift to higher-cost drugs, the study said.

45.   The reason is suburban sprawl, said the study by the Surface Transportation Policy Projeer.

46.   The review panel said the study, while not providing hepatitis B vaccinations to participants, was not withholding those inoculations.

47.   There is no evidence that any nuclear material has left Russia for terrorist groups or countries that are seeking to become nuclear powers, the study said.

48.   The wildlife group said its study, titled Higher Ground, proved that many thousands of homes remain susceptible.

49.   There is no routine tracking of compliance, and in many instances compliance has been poor at best, the study said.

50.   They said earlier studies suggesting economic harm were smaller and were financed by the tobacco industry.

v. + study >>共 521
conduct 10.69%
do 6.49%
complete 4.48%
publish 3.35%
need 2.67%
release 2.40%
fund 2.39%
cite 2.30%
continue 2.21%
begin 2.15%
say 1.74%
say + n. >>共 862
official 10.72%
police 6.88%
spokesman 3.72%
no 3.22%
analyst 2.66%
report 2.47%
source 2.45%
trader 1.74%
goodbye 1.60%
thing 1.27%
study 0.16%
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