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At most how much calories derived from added sugar is considered sound in the diet

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How much added sugar did each American consumein 1994

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What kind of nutrition does added sugar contain

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Our body does not distinguish between added sugar and natural sugar in foods, does it

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What are the largest single source of added sugar

[单项选择]—How much sugar is left（）
A. None
B. Nothing
C. Not many
D. Few

[单项选择]At least how much money must be added to an old ticket for a new one
A. 40 dollars.
B. 7. 95 dollars.
C. 5 cents.
D. 50 cents.

[单项选择]How much has Steven Spielberg earned from Jurassic Park
A. US $ 40 million.
B. US $120 million.
C. US $ 300 million.
D. US $ 20 million.

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As they grow older, most people wonder how increasing age will affect intelligence. Can people in middle age and beyond expect to think as effectively and to solve problems as efficiently as they have in the past
One of the difficulties in comparing the intellectual functioning of people at different ages is the problem of cohort((具有相同特征的)一群人) effects. Different age groups in the population have experienced different historical events (wars, exposure to television, and so on) as well as changes in the general standard of living. Different scores that people of varying ages achieve on intelligence tests could be partly due to changes in diet, housing, or health care or, even more likely, to the amount and quality of education. Since the beginning of this century, there has been a trend for more people to go to school and to remain in school longer. Because it eliminates these cohort effects, a longevous (长寿的) study may be the best way to look at age-related changes in inte
A. individual experiences
B. general standard of living
C. diet, housing, or health care
D. many variables

[填空题]Most animals know how to relax and they know the importance of (relax) ______ to their survival.

[单项选择]

In the angry debate over how much of IQ comes from the genes that children inherit from parents and how much comes from experiences, one little fact gets overlooked: no one has identified any genes (other than those that cause retardation) that affect intelligence. So researchers led by Robert Plomin of London’s Institute of Psychiatry decided to look for some:
Plomin’s colleagues drew blood from two groups of 51 children each. They are all White living in six counties around Cleveland. In one group, the average IQ is 136. In the other group, the average IQ is 103. Isolating the blood cells, the researchers then examined each child’s chromosome 6 (One of the 23 human chromosomes). Of the 37 land marks on chromosome 6that the researchers looked for, one jumped out: a form of gene called IGF2R occurred in twice as many children in high IQ group as in the average grouw-32 percent versus 16 percent. The study concludes that it is this form of the IGF2R gene,
A. scientists have reached an agreement
B. scientists’ opinions vary
C. no genes have ever been identified
D. scientists have found many smart genes

[简答题]Most people know how to count, but the way we master this ability remains something of a puzzle. Numerals were invented only around four to five thousand years ago, meaning it is unlikely that enough time has elapsed for specialized parts of the brain for processing numbers to evolve, which suggests that math is largely a cultural invention. It appears to be based on an interface between vision and reasoning that we share with other animals, allowing us to "see" small numbers—up to around five—without counting. This ability—often called ’the number sense’—lays the foundations of later mathematical knowledge, but its basis is poorly understood. It has been argued that the number sense itself may be innate, but this fails to account for why learning to master the use of small numbers is such a difficult and drawn-out process in children.