鼻咽癌累及视神经可致（）。 A.面部麻木 B.眼球外展受限 C.视力障碍 D.声嘶

Napping(小睡) after learning something new could help improve your memory--- as long as you dream, scientists say.

They found people who dream about a new task do it better on waking than those who do not sleep or do not dream.

Volunteers were asked to learn the layout(布局，设计) of a 3D computer maze(迷宫) so they could find their way several hours later. Those allowed to take a pap and who also remembered dreaming of the task, found their way to a landmark quicker.

The researchers think the dreams are a sign that unconscious(无意识的) parts of the brain are working hard to process information about the task..

Dr. Robert Stickgold of Harvard Medical School, said dreams may be a marker that the brain is working on the same problem at many levels.

Study tips

Co-author Dr. Erin Wamsley said the study suggests our non-conscious brain works on the things that it deem(认为) are the most important.

“Every day we are gathering lots of information and new experiences,” she said. “It would seem that our dreams are asking the question, “How do I use this information to inform(影响) my life?”

The scientists say there may be ways to use this phenomenon(现象) for improving learning and memory. For example, students might be better studying hard before bedtime, or taking a nap after a period of afternoon study.

小题1: Scientists say ______ could help improve your memory.

A．dream

B．nap

C．nap and dream

D．nap without dream小题2: What were volunteers asked to do?

A．Take a nap.

B．Dream a task.

C．Learn about 3D computer.

D．Find their way out of a maze.小题3:Which is right about dreams?

A．They are a sign that parts of the brain is unconscious.

B．They can help us fall asleep and improve learning and memory.

C．They tell us how to use this information to inform our life.

D．They may be a marker that the brain is working on the same problem.小题4:When is the best time for study?

A．Before bedtime.

B．After bedtime.

C．Before taking a nap.

D．In the afternoon.

既凉血止血，又清肝泻火明目的药物是（）

A.槐花

B.大蓟

C.地榆

D.白茅根

E.侧柏叶

（1）在湖边散步的小明惊奇的发现一只小鸟在水中飞翔，他所看到的是空中小鸟的           （填“实”或“虚”像）．当小鸟向高处飞行时，水中的“小鸟”将           （填“靠近”或“远离”）水面．

（2）在暗室中将三原色光投射到白色屏上，其投射情况如图所示，A区域是           色，光在白色屏上发生的是            （填“镜面”或“漫”）反射

据报道，美囯计划2021年开始每年送15000名游客上太空旅游．如图所示，当航天器围绕地球做椭圆轨道运行时，近地点A的速率______（填“大于”、“小球”、或“等于”）远地点B的速率．

螺纹的三大要素为牙型、外径和（）。

A.牙型

B.外径

C.内径

D.螺距