单选题
Although too much(1)to the sun’s ultraviolet rays can cause skin cancer, sunshine may have a(2)effect against some cancers, U.S. scientists said in April. They(3)vitamin D, the so-called sunshine vitamin that is also found in fortified milk and(4)products, cod liver and some fatty fish, can help to slow down the speed(5)which cancer(6)divide. “This study found inverse(7) between both residential and occupational exposure to sunlight(8)mortality from female breast and colon cancers,” said Dr. Michael Freedman of the National Cancer
(
9
)
.
In research(10)in Occupational and Environmental Medicine, Freedman and his team studied(11)from breast, ovarian, colon, prostate and skin cancers in 24 U.S. states between 1984 and 1995 to determine the(12)of sunlight on the disease. (13)surprisingly, they found more deaths from skin cancer in sunnier(14)but the number of people who died from the other cancers was lower in the(15)areas. Working(16)in a sunny climate was also associated with(17)breast and colon cancer deaths but not(18)the other cancers. Freedman said more research is needed to(19)the association between sunlight and(20)cancers.
问题1选项
A.exposure
B.addition
C.resolution
D.solution
问题2选项
A.potential
B.protective
C.insufficient
D.effective
问题3选项
A.signify
B.prescribe
C.reassure
D.suspect
问题4选项
A.agricultural
B.bean
C.meat
D.dairy
问题5选项
A.with
B.beyond
C.at
D.in
问题6选项
A.portions
B.cells
C.diseases
D.illnesses
问题7选项
A.associations
B.conclusions
C.judgments
D.illusions
问题8选项
A.or
B.for
C.but
D.and
问题9选项
A.Constitution
B.Conference
C.Institute
D.Operation
问题10选项
A.done
B.concerned
C.involved
D.reported
问题11选项
A.deaths
B.pains
C.sufferings
D.effects
问题12选项
A.degree
B.impact
C.intensity
D.depth
问题13选项
A.More
B.Not
C.Much
D.No
问题14选项
A.states
B.countries
C.cities
D.provinces
问题15选项
A.wet
B.windy
C.sunshine
D.dry
问题16选项
A.heavily
B.outdoors
C.offensively
D.hard
问题17选项
A.more
B.many
C.less
D.fewer
问题18选项
A.with
B.for
C.on
D.to
问题19选项
A.indicate
B.propel
C.explain
D.generate
问题20选项
A.other
B.vital
C.certain
D.severe