胸段脊髓半切综合征（Brown－Sequard）的运动障碍表现为

style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    The Virginia address is the first of several Duncan will make in October to press for b candidates to enter teaching. He’ll host a virtual town meeting with teachers from around the nation oil Oct. 20，then deliver a major address on teacher preparation two days later in New York City. 
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    Duncan stressed the importance of teaching as the U. S. competes with an increasingly educated global work force，saying strong education is needed to reduce dropout rates among African-American，Latino and low-income students. “I believe that education is the civil s issue of our generation，”Duncan said. “If you care about promoting opportunity and reducing inequality and social injustice，the classroom is the place to start. ”
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    Duncan noted that the next four years alone could see one-third of the nation’s teachers and administrators leave. The departure of veteran educators will create huge demand for new teachers--200，000 annually in good economic times，he said. 
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    Duncan stressed that the demand for teachers is greatest amon9“high-poverty，high-needs” and rural schools, as well as in subjects such as math and science. “It is especially troubling，”he added，“that less than 2 percent of our nation’s teachers are African-American males. ”
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    Duncan said the way to bring more young black men into the teaching profession is to make sure that they continue their studies and don’t drop out at the high rates they do IIOW. “0ur African male dropout rate is too high. If you’re dropping out of high school you can’t be a teacher,” he said. 
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    Duncan said the nation cannot rely alone oil schools of education to produce the next generation of teachers. He called for expanding alternatives such as Teach for America which recruits recent college graduates to teach in schools in poor communities for at least two years. 

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    If you want to teach your children howto say sorry, you must be good at saying it yourself, especially to your own children. But how you say it can be quite tricky.
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/If you say to your children "I'm sorry I got angry with you, but ..." what follows that "but" can render the apology ineffective: "I had a bad day" or "your noise was giving me a headache" leaves the person who has been injured feeling that he should be apologizing for his bad behavior in expecting an apology.
   Another method by which people appear to apologize without actually doing so is to say "I'm sorry you're upset"; this suggests that you are somehow at fault for allowing your self to get upset by what the other person has done.
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    Then there is the general, all covering apology, which avoids the necessity of identifying a specific act that was particularly hurtful or insulting, and which the person who is apologizing should promise never to do again. Saying "I'm useless as a parent"does not commit a person to any specific improvement. These pseudo-apologies are used by people who believe saying sorry shows weakness, Parents who wish to teach their children to apologize should see it as a sign of strength, and there forenot resort to these pseudo-apologies.
   But even when presented with examples of genuine contrition, children still need help to be-come aware of the complexities of saying sorry. A three-year-old might need help in under standing that other children feel pain just as he does, and that hitting a playmate over the head with a heavy toy requires an apology. A six-year-old might need reminding that spoiling other children' s expectations can require an apology.A 12-year-old might need to be shown that raiding the biscuit tin with-out asking permission is acceptable, but that borrowing a parent' s clothes without permission is not.

    If you want to teach your children howto say sorry, you must be good at saying it yourself, especially to your own children. But how you say it can be quite tricky.
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/If you say to your children "I'm sorry I got angry with you, but ..." what follows that "but" can render the apology ineffective: "I had a bad day" or "your noise was giving me a headache" leaves the person who has been injured feeling that he should be apologizing for his bad behavior in expecting an apology.
   Another method by which people appear to apologize without actually doing so is to say "I'm sorry you're upset"; this suggests that you are somehow at fault for allowing your self to get upset by what the other person has done.
style=color: rgb(51, 51, 51); font-family: "Microsoft YaHei"; white-space: normal; background-color: rgb(250, 250, 250);/    Then there is the general, all covering apology, which avoids the necessity of identifying a specific act that was particularly hurtful or insulting, and which the person who is apologizing should promise never to do again. Saying "I'm useless as a parent"does not commit a person to any specific improvement. These pseudo-apologies are used by people who believe saying sorry shows weakness, Parents who wish to teach their children to apologize should see it as a sign of strength, and there forenot resort to these pseudo-apologies.
   But even when presented with examples of genuine contrition, children still need help to be-come aware of the complexities of saying sorry. A three-year-old might need help in under standing that other children feel pain just as he does, and that hitting a playmate over the head with a heavy toy requires an apology. A six-year-old might need reminding that spoiling other children' s expectations can require an apology.A 12-year-old might need to be shown that raiding the biscuit tin with-out asking permission is acceptable, but that borrowing a parent' s clothes without permission is not.