皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
Easy Ways to Keep Your Brain Sharp Everyone is forgetful, but as we age, we start to feel like ou r brains are slowing down a bit and that can be a very annoying thing. 1 Read on for some techniques worth trying. 1. 2 People who regularly made plans and looked forward to upcoming events had a 50 percent reduced chance of Alzheimer's disease ( 老年性痴呆症 ), according to a recent study. 3 Something as simple as setting a goal to have a weekly coffee date with a friend will do. There's evidence that people who have a purpose in life or who are working on long or short-term goals appear to do better. In other words, keep your brain looking forward. 2. Go for a walk. Mildly raised glucose( 葡萄糖 )levels can harm the area of the brain that helps you form memories and physical activity can help get blood glucose down to normal levels. In fact, exercise produces chemicals that are good for your brain. 4 3. Learn something new. Take a Spanish class online, join a drawing club, or learn to play cards. A study found that mental stimulation limits the weakening effects of aging on memory and the mind. But the best thing for your brain is when you learn something new and are physically active at the same time. 5 Or you can just go dancing with your friends. A. Focus on the future. B. This can be especially harmful to the aged. C. It should be something like learning gardening. D. So take a few minutes each day to do some reading. E. But don't worry if our schedule isn't filled with life-changing events. F. Luckily, research shows there is a lot you can do to avoid those moments. G. In other words, when you take care of your body, you take care of your brain.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】如果要在Oracle系统中进行数据库建模,使用的是( )。
A.
SQL Connect
B.
Oracle Designer/2000
C.
Oracle Developer/2000
D.
Oracle Discoverer/2000
【简答题】实二次型 的秩为 ,正惯性指数为 .
【简答题】Oracle系统中最新推出的__________ 是业界第一个完整的、简单的用于互联网的新一代智能化的、协作各种应用软件的基础框架。
【简答题】如果要在Oracle系统中进行数据库建模,使用的是( )。 A)SQL Connect B)Oracle Designer/2000 C)Oracle Developer/2000 D)Oracle Discoverer/2000
【简答题】Oracle系统中最新推出的______是业界第一个完整的、简单的用于互联网的新一代智能化的、协作齐种应用软件的基础框架。
【单选题】实数域上四元二次型 ,如果二次型的秩和正惯性指数都等于3,则下列说法中( )正确.
A.
二次型的规范形为
B.
二次型矩阵的行列式
C.
二次型的矩阵合同于单位矩阵
D.
二次型的符号差为0
【单选题】某材料吸水饱和后质量为20kg,烘干到恒重时的质量为16kg,则材料的(    )。
A.
质量吸水率为25%    
B.
体积吸水率为25%
C.
质量吸水率为20%    
D.
体积吸水率为20%
【单选题】若使用Oracle系统开发一个数据库应用系统,在进行数据库模式设计时,在如下所列出的软件中,应选用( )。
A.
Oracle Developer/2000
B.
Oracle Designer/2000
C.
Oracle PL/SQL
D.
Oracle RDBMS
【单选题】某材料吸水饱和后质量为10kg,烘干到恒重时的质量为8kg,则材料的( )。
A.
质量吸水率为25%
B.
体积吸水率为25%
C.
质量吸水率为20%
D.
体积吸水率为20%
【单选题】某材料吸水饱和后质量为20kg,烘干到恒重时的质量为体积吸水率为16kg,则材料的()
A.
质量吸水率为25%
B.
体积吸水率为25%
C.
质量吸水率为20%
D.
积吸水率为20%
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题