更多"[单选题]Keep your room tidy."的相关试题:
[单选题]Keep your passport in a secure place.
A.special
B.good
C.safe
D.different
[单选题]To keep health, we have to keep () hours.
A.reliable
B.regular
C.reluctant
D.religious
[不定项选择题]共用题干
第二篇
One一Room Schools
One-room sohools are part of the heritage of the United States,and the mention of them makeo PeoPle
feel a longing for"the way things were".One-room schools are an endangered species,however.For more
than a hundred years,one-room schools have been systematically shut down and their students sent away to
centralized schools.As recently as 1930 there were 149,000 one-room schools in the United States.By 1970
there werel,800.Today,of the nearly 800 remaining one-room schools,more than 350 are in Nebraska.The
rest are spread through a few other states that have on their road maps wide-open spaces between towns.
Now that there are hardly any left,educators are beginning to think that maybe there 15 something yet to
be leamed from one-room schools,something that served the pioneers that might serve as well today.Progres-
sive educators have come uP with progressive-sounding names like"peer-group teaching"and"multi-age
grouping" for educational procedures that occur naturally in one-room schools.In a one-room school the chil-
dren teach each other because the teacher 15 busy part of the time teaching someone else.A fourth grader can
work at a fifth-grade level in math and a third-grade level in English without the bad name associated with
being left back or the pressures of being skiPped ahead.A youngster with a learning disability can find his or
her own level without being separated from the other pupils.A few hours in a small school that has only one
classroom and it becomes clear why so many parents feel that one of the advantages of living in Nebraska is
that their children have to go to a one-room school.
What is the author's attitude towards one-room schools?
A.Critical.
B.Humorous.
C.Angry.
D.Praising.
[单选题]Cell Phone Lets Your Secrets Out
Your cell phone holds secrets about you.Besides the names and numbers that you've programmed into it, ______traces____(51) of your DNA linger (遗留) on thedevice according to a new study
DNA is genetic (遗传的)material _____that_____ (52) appears in every cell. Like your fingerprint, yourDNA is _____unique______ (53) to you——unless you have an identical twin. Scientiststoday analyze DNA in blood, saliva (唾液), orhair left ____behind_______ (54) at the scene of a crime. The results oftenhelp detectives identify ____criminals______ (55) and their victims. Your cellphone can reveal more about you ____than_____ (56) you might think.
Meghan J. McFadden, a scientist at McMasterUniversity in Hamilton, Ontario, heard about a crime in which the suspect bledonto a cell phone and later dropped the____device_____ (57). This made herwonder whether traces of DNA lingered on cell phones一evenwhen no blood was___involved_____(58). She and colleague Margaret Wallace ofthe City University of NewYork analyzed the flip-open phones(翻盖手机)of10 volunteers. They used swabs (药签) tocollect _____invisible___ (59) traces of the users from two parts of the phone:the outside, where the user ____holds_____(60) it, and the speaker which isplaced at the user's ear
The scientists cleaned the phones using asolution made mostly__of____(61) alcohol. The aim of washing was to remove alldetectable traces of DN
A. The owners got their phones back for another week.Then the researchers ___returned________ (62) the phones and cleaned each phoneonce more.
The scientists discovered DNA that _____belonged______(63) to the phone's speaker on each of the phones. Better samples werecollected from the outside of each phone, but those swabs also picked up DNAthat belonged to other people who had apparently also ____handed______ (64) thephone
Surprisingly, DNA showed up even in swabsthat were taken immediately after the phones were scrubbed. That suggests thatwashing won't remove all traces of ___evidence________ (65) from a criminal'sdevice. So cell phones can now be added to the list of clues that can clinch (确定)a crime-scene investigation.
文章(41~55)
A.name
B.pictures
C.shapes
D.traces
