对研究题目“探讨为老年人提供健康”进行修改，使选题明确可行。

有一种杂技表演叫“飞车走壁”，由杂技演员驾驶摩托车沿光滑圆台形表演台的侧壁高速行驶，在水平面内做匀速圆周运动。图中粗线圆表示摩托车的行驶轨迹，轨迹离地面的高度为h。如果增大高度h，则下列关于摩托车说法正确的是

A．对侧壁的压力N增大

B．做圆周运动的周期T不变

C．做圆周运动的向心力F增大

D．做圆周运动的线速度增大

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。

Are you truly happy? Do you ever know what it means to be happy and what it takes to achieve happiness? ___小题1:__. The following are a few tips that I follow to create happiness in my life.

※ Make a plan for attaining goals that you believe will make you happy. Your moods will very likely increase if you are going after something you value.

※Surround yourself with happy people. It is easy to begin to think negatively when you are surrounded by people who think that way. ___小题2:___.

※When something goes wrong, try to figure out a solution instead of being absorbed in self pity. Truly happy people don’ t allow setbacks to affect their mood because they know that with a little thought they can turn the circumstances back to their favor.

※ 小题3:  . These few minutes will give you the opportunity to focus on the positive things in your life and will lead you to continuous happiness.

※ 小题4:   . Whether you treat yourself to lunch, take a long, relaxing bath or simply spend a few extra minutes on your appearance, you will be subconsciously (下意识地) putting yourself in a better mood.

※Finding the humor in situations can also lead to happiness. Find a way to make light of a situation that would otherwise make you happy.

※Keeping healthy is another way to achieve happiness.  小题5:  .

A．What makes one person happy may be very different from what makes someone else happy.

B．On the contrary, if you are around people who are happy, their emotional state will be infectious.

C．Being overweight or not eating nutritious foods can have a negative effect on your mood．

D．These are important questions for anyone who is seeking happiness to ask themselves.E．Spend a few minutes each day thinking about the things that make you happy.

F．There are some tips in life that lead to happiness.

G．It’ s also important to take some time each day to do something nice for yourself.

“密斯风格”的主要表现是()

A．底层架空设独立支柱

B．横向长窗

C．运用钢和玻璃为专一手段

D．建筑外表是裸露的混凝土，不加修饰

一般而言，科学家总是把创新性研究当做自己的目标，并且只把同样具有此种目标的人作为自己的同行。因此，如果有的科学家因为向大众普及科学知识而赢得赞誉，虽然大多数科学家会认同这种赞誉，但不会把这样的科学家作为自己的同行。
Ⅰ．创新性科学研究比普及科学知识更重要。
Ⅱ．大多数科学家认为，普及科学知识不需要创新性研究。
Ⅲ．大多数科学家认为，从事普及科学知识，不可能同时进行创新性研究。

A．只有Ⅰ。
B．只有Ⅱ。
C．只有Ⅲ。
D．只有Ⅱ和Ⅲ。
E．Ⅰ、Ⅱ和Ⅲ。

一用户监视器的电脑桌面看上去有点扭曲，你怎么解决这个问题（）。

A.换一台监视器

B.试一下其他的程序

C.换电源

D.安装额外的显存

E.在DOS模式下启动电脑