更多"Dr. Calerin's efforts could lea"的相关试题:
[填空题]A researcher says lead in the environment could be a major cause of violence by young people. Doctor Herbert Needleman is a professor at the University of Pittsburgh School of Medicine in Pennsylvania. He says the (36) of lead in the brain changes the neurons that control actions and that can cause a person to act in antisocial and (37) ways.
Lead is a metal that is (38) dangerous to babies and young children. They can get it into their bodies by breathing or (39) lead dust, or by eating soil or pieces of lead paint. Children with high levels of lead can (40) brain and nervous system damage, learning (41) , slow growth, headaches and hearing loss.
In the 19th century, Doctor Needleman found lower scores on (42) tests even in children who did not have such signs of lead (43) . After that, lead was removed from gasoline and paint in the United States. Yet many homes still have old lea
[填空题]If you could find some witness it could greatly (strength) ______ his case.
[单项选择]Estimating schedule activity costs involves developing an (74) of the cost of the resources needed to complete each schedule activity．
A. accuracy
B. approximation
C. specification
D. summary
[填空题]Many scientists are deeply dedicated to the development of science, and their written account of their life __________________________ (将是给后代的一份珍贵礼物)
[单项选择]"Lead (metal)" and "lead(dog's head)" are spelt in the same way, but pronounced differently. This kind of sense relation is called ______.
A. polysemy
B. antonymy
C. homonymy
D. hyponymy
[填空题]In addition to his theory of colour, Newton developed a theory of how light travels. This is known as the corpuscular (微粒子的) theory of light, meaning that light travels as a series of tiny bits rather than of continuing waves. Newton sent his writings about light to the Royal society, where they were given to a committee led by Hooke. Since the corpuscular theory was different from his own theory, Hooke attacked the paper. Soon other started to argue, and Hooke was supported by a scientist from Holland, Christian Huygens. At one time, Newton was so unhappy with the whole affair that he decided never again to publish any of his work.
The bitter argument continued over the years that followed. At first, Hooke and Huygens received most of the support. Later Newton had changed his mind and let his work on gravity be published, he became so famous that things changed. Now people believed Newton could do nothing, wrong, and for a hundred years they followed his theory. Then, in the ea
