问题 多项选择题

有关革酚酮类化合物描述正确的是()

A.一类变形单萜,碳架不符合异戊二烯定则

B.酚羟基易甲基化,不易酰化

C.酸性介于一般酚类和羧酸之间

D.能与多种金属离子形成络合物,并显示不同颜色,可用于鉴别

E.分子中羰基类似于羧酸中羰基的性质,但不能和一般羰基试剂反应

答案

参考答案:A, B, C, D, E

单项选择题
完形填空

第二节(共5小题;每小题2分,满分10分)

  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。

  Are you truly hapy? Do you ever know what it means to be happy and what it takes to achieve happiness? 71 The following are a few tips that I follow to create happiness in my life.

  *Make a plan for attaining goals that you lelieve 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(消极地) when you are surrounde by people who think that way. 72

  *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.

  * 73 There few minutes will give you tthe opportunity to focus on the positive things in your life and will lead you to continuous happiness.

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

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

  *Keeping healthy is another way to achieve happiness. 75

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 infections.

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.