已知，。下列关于不溶物之间转化的说法中错误的是： A．不溶于水，不能转化为 B．

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。选项中有两项为多余选项。

Easy Ways to Keep Your Brain Sharp

Everyone is forgetful, but as we age, we start to feel like our brains are slowing down a bit and that can be a very annoying thing.      小题1:     Read on for some techniques worth trying. 

1.      小题2:    .

People who regularly made plans and looked forward to upcoming events had a 50 percent reduced chance of Alzheimer’s disease (早老性痴呆症), according to a recent study.      小题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.     小题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 (刺激) 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.        小题5:    or 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 your 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.

下述支架不用弯制法制作的是

A．间接固位体

B．直接固位体

C．加强网

D．加强丝

E．连接体

完成句子。

1. "They didn't take measures in time", the expert said firmly and angrily, "otherwise the

     explosions ___________." (happen)

    "他们没有及时采取措施,"专家坚定且愤怒地说道,"否则爆炸不会发生."

2. Soon after getting off his horse, the captain appeared at the second storey windows, _______

     nothing but trees. (see)

   下马不久,上尉就出现在二楼的窗口了, 从那里除了树木他什么也没看到.

3. Rosalyn loves sports. She is proud _________ competitions and to have broken a record by

    running 800 meters this year. (participate)

    罗莎琳热爱运动.她为今年参加比赛并打破800米赛跑的记录而感到骄傲.

4. _________ should be no reason for treating one's neighbors as strangers. (occupy)

   工作繁忙不应该成为"对面不相识"的借口.

5. He went on a bus tour with a group of people, _________ before. (travel)

   他和一群人乘坐巴士旅行,这群人中的大多数以前从没旅行过.

6. My son has been away from home for about 2 weeks. I'm looking forward to ________. (hear)

    我儿子离家差不多两周了.我盼望着收到他的来信.

7. I think that only in this way _________ the knowledge and skills needed for my job. (acquire)

   我认为只有通过这种方式我才能获得工作所需要的知识与技能.

8. _______ that China produces one third of the world's cigarettes. (astonish)

    令人震惊的是全世界三分之一的香烟是由中国生产的.

9. Even though Tony had been so clever, he would have to be rebuilt- you cannot have _________

   with machines.(fall)

   尽管托尼很聪明,他还得作一番改造--总不能允许女人与机器人相爱吧.

10. It's time for me to quit smoking, for I do hope to live as ________as my grandfather has. (healthy)

      我该戒烟了,因为我真的希望能过着像我的祖父一样长寿健康的生活.

生素E的防癌功能除外（）。

A.抑制N-亚硝基化合物在体内合成

B.在肠道益生菌的作用下生成短链脂肪酸

C.刺激抑癌基因p53的表达

D.作为抗氧化剂对抗癌症导致的自由基反应

E.在清除自由基方面与硒协同作用