更多"Recently, book publishers got some "的相关试题:
[填空题]Recently, book publishers got some good news. Researchers gave 852 disadvantaged students 12 books to take home at the end of the school year. They did this for three (36) years.
Then the researchers looked at those students’ test scores. They found that the students who brought the books home had (37) higher reading scores than other students. These students were less (38) by the "summer slide"—the decline that especially afflicts lower-income students during the vacation months. In fact, just having those 12 books seemed to have as much (39) effect as attending summer school.
This study, along with many others, (40) the tremendous power of books. We already knew, from research in 27 countries, that kids who grow up in a home with 500 books stay in school longer and do better. This new study suggests that introducing books into homes that may not have them also produces significant educational gains.
Recently,
[单项选择]Why does cream go bad faster than butter Some researchers think they find the answer, and it comes down to the structure of the food, not its chemical composition--a finding that could help rid some processed foods of chemical preservatives.
Cream and butter contain pretty much the same substances, so why cream should sour much faster has been a mystery. Both are emulsions--tiny globules (小球) of one liquid evenly distributed throughout another. "The difference lies in what’s in the globules and what’s in the surrounding liquid", says Brocklehurst, who led the investigation. In cream, fatty globules drift about in a sea of water. In butter, globules of a watery solution are locked away in a sea of fat. The bacteria which make the food go bad prefer to live in the watery regions of the mixture. "This means that in cream, the bacteria are free to grow throughout the mixture", he says.
When the situation is reversed, the bacteria are locked away in compartments (密封仓) buried deep
A. it suggested a way to keep some foods fresh without preservatives
B. it discovered tiny globules in both cream and butter
C. it revealed the secret of how bacteria multiply in cream and butter
D. it found that cream and butter share the same chemical composition
[填空题]Theorists aim at making non-theorists do some research about______within the framework set by them.