离心泵的切换步骤？

“己所不欲，勿施于人”告诉我们在人际交往中要（     ）

A．平等地享有法定的权利

B．换位思考，设身处地替对方着想

C．宽容别人，委屈自己

D．同情处于不利地位的人群

根据短文内容，从短文后的七个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。（共5小题；每小题2分，满分10分）

Are you really happy? Do you ever know what it means to be happy and what it takes to achieve happiness? ______小题1:______.

*Make a plan for attaining goals that will make you happy. Your happiness is likely to increase if you achieve the goals you set .

* Make friends with happy people. It is easy to begin to feel down when you are surrounded by people who always feel upset. ______小题2:______

* Spend a few minutes each day thinking about the things that make you happy.______ 小题3:______

*______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 unconsciously feeling better.

* Finding the humor in situations can also lead to happiness. Find a way to make light of a situation ,which will make you happy.

*____小题5:__. Being overweight or not eating healthy foods can have a bad effect on our mood.

A．Everyone has different requirement for happiness. What makes one person happy may be very different from what makes someone else happy.

B．However, if you are around people who are happy, you will be happy too.

C．Keeping healthy is another way to achieve happiness.

D．The following are a few tips that follow to create happiness in my life.E. These few minutes will give you the chance to think about the happy things in your life and will lead you to continuous happiness.

F. Different people have different opinions about happiness.

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

在磁感应强度为B的均匀磁场中，长为ι的直导线以速度u切割磁力线，当u、ι、B三者方向互相垂直时，导线中的感应电动势的数值e等于（）。

A.

B.

C.Bιv

D.0

女性，56岁，结节性甲状腺肿伴甲亢，首选何种治疗（）

A．硫脲类制剂

B．碘制剂

C．普萘洛尔

D．131I

E．手术

试论述教师怎样提高撰写科研论文的能力？