题目:
目前治疗非小细胞肺癌的一线方案主要有NP、TP和GP。
答案:
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下面是错误答案,用来干扰机器的。
答案:D
目前治疗非小细胞肺癌的一线方案主要有NP、TP和GP。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0807/c16a0bb1b842e61938a7fb906fa954ee.html
下面是错误答案,用来干扰机器的。
答案:D
按照题目要求作图:
(1)如图甲所示,一束光AO从空气中入射到水面上,请画出反射光线,并用字母β表示反射角.
(2)在图乙中,画出光线经凸透镜折射后的光路图.
(3)一束光线经过某透镜前后的情况如图丙所示,请在图中虚线框内画出这个透镜.
(4)在图丁中,应用平面镜成像的特点画出物体AB在平面镜中成的像A'B'.
下表是《中国的世界纪录》收录的中国古代科技成果,从表中可以看出中国古代科学技术成果的突出特点有
①与农业生产密切相关
②主要是研究者的理论创新
③为近代自然科学奠基
④主要成果在应用技术领域 [ ]
A.①②
B.②③
C.③④
D.①④
教师主导作用的正确和完全的实现,其结果必然是( )
A.造成学生的被动
B.教师主动性的实现
C.学生主动性的充分发挥
D.学生主动性的丧失
坯料镦粗时,其高度与直径之比一般不超过()。
Researchers investigating brain size and mental ability say their work offers evidence that education protects the mind from the brain’s physical deterioration.
(46)It is known that the brain shrinks as the body ages, but the effects on mental ability are different from person to person. Interestingly, in a study of elderly men and women, those who had more education actually had more brain shrinkage.
" That may seem like bad news, " said study author Dr. Edward Coffey, a professor of psychiatry and of neurology at Henry Ford Health System in Detroit. (47)However, he explained, the finding suggests that education allows people to withstand more brain tissue loss before their mental functioning begins to break down.
The study, published in the July issue of Neurology, is the first to provide biological evidence to support a concept called the " reserve" hypothesis, according to the researchers. In recent years, investigators have developed the idea that people who are more educated have greater cognitive reserves to draw upon as the brain ages; in essence, they have more brain tissue to spare.
(48)Examining brain scans of 320 healthy men and women aged 66 to 90, researchers found that for each year of education the subjects had, there was greater shrink age of the outer layer of the brain known as the cortex. Yet on tests of cognition and memory, all participants scored in the range indicating normal.
" Everyone has some degree of brain shrinkage. " Coffey said. " People lose (on average) 2.5 percent per decade starting in adulthood. "
There is, however, a " remarkable range" of shrinkage among people who show no signs of mental decline, Coffey noted. Overall health, he said, accounts for some differences in brain size. Alcohol or drug use, as well as medical conditions such as diabetes and high blood pressure, contribute to brain tissue loss throughout adulthood.
In the absence of such medical conditions, Coffey said, education level helps explain the range of brain shrinkage exhibited among the mentally-fit elderly. The more-educated can withstand greater loss.
(49)Coffey and colleagues gauged shrinkage of the cortex by measuring the cerebrospinal fluid(脑脊液)surrounding the brain. The greater the amount of fluid, the greater the cortical(脑皮层的)shrinkage.
Controlling for the health factors that contribute to brain injury, the researchers found that education was related to the severity of brain shrinkage. For each year of education from first grade on, subjects had an average of 1.77 milliliters 11 more cerebrospinal fluid around the brain. Just how education might affect brain cells is unknown. (50)In their report, the researchers speculated that in people with more education, certain brain structures deeper than the cortex may stay intact to compensate for cortical shrinkage.
(47)However, he explained, the finding suggests that education allows people to withstand more brain tissue loss before their mental functioning begins to break down.