采用成品的研磨膏或固体研磨剂，使用是根据需要选择适当规格加（）稀释即可。 A.柴油

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.

将下列句子按正确的顺序排列。  

(1)爱也是摸不着的，但你却能感到她带来的甜蜜。  

(2)你摸不到云彩，但你能感觉到雨水。  

(3)没有爱，你就不快活，也不想玩了。  

(4)你也知道，在经过一天酷热日晒之后，要是花和大地能得到雨水会是多么高兴呀！  

正确的顺序是：                                                              

在下列有关声卡的叙述中，错误的是

A．声卡的主要功能是控制波形声音和MIDI声音的输入和输出

B．波形声音的质量与量化位数、采样频率有关

C．声卡中数字信号处理器在完成数字声音的编码、解码及编辑操作中起着重要的作用

D．声卡所要求的数据传输率不高，用ISA总线进行传输即可

如果要创建一个3级分组报表，第一级分组是“工厂”，第二级分组是“车间”，第三级分组是“工资总和”，当前索引的索引表达式应当是( )。

A．工厂+车间+工资总和

B．工厂+车间+STR(工资总和)

C．车间+工厂+STR(工资总和)

D．STR(工资总和)+车间+工厂

下列说法中，正确的是( )。

A．高质量的公司债券不存在经营风险

B．在资产配置方案中，固定收益证券的基本优点是在通货紧缩的条件下可以套期保值

C．政府债券的规避风险为零，是债券组合的理想产品

D．与现金流匹配相比，多重免疫策略没有持续期的要求