品牌审美

已知一个数与5的和为-2，这个数是______．

阅读理解。

    Here is some advice to help you develop confidence(信心) and make friends at school:

    ●Take a deep breath. You shouldn't be so nervous. Remember that in your new school you will find

kids at your age. You're going to meet people like you there.

    ●Do something nice for someone. Save someone a seat. Say" Hi" in the hall. Give congratulations for

a job well done.

    ●Use friendly gestures (姿态). Try smiling and laughing a bit when talking to others. This will make you

feel more relaxed. Be yourself. If your friends don't accept you, they're not real friends. Join after-school

activities you like. Even if you don't know anyone there, you'll all share a common interest.

    ●Look for other people who are new to the school. You're probably not the only one and at least, you'll have one thing in common: you're both in a new environment(环境). So making new friends shouldn't be

so hard.

    ●Don't sit at the back of the class where other people don't notice you! Try to sit in the middle where

you are around everyone and can make conversations with them.

1. What should you do if your classmates win a football game?

                                               ______________         

2. Do you have to change yourself to let your friends accept you?                                               

__________________________________________                                                          

3. You may     __    after school to meet someone who shares a common interest with you.

4. Where should you sit in the class?

                                                ______________        

5. What is the best title of this passage?

                                              ______________          

下图漫画《助农》启示我们

A、助农要做到一切从实际出发

B、助农要采取一分为二的方法

C、助农要用社会历史观看问题

D、助农要坚持整体与部分统一

一质量m=0.5kg的滑块以一定的初速度冲上一倾角为30°足够长的斜面，某同学利用DIS实验系统测出了滑块冲上斜面过程中多个时刻的瞬时速度，如图所示为通过计算机绘制出的滑块上滑过程的v-t图．求：（g取10m/s²）

（1）滑块冲上斜面过程中加速度大小；

（2）滑块与斜面间的动摩擦因数；

（3）判断滑块最后能否返回斜面底端？若能返回，求出返回斜面底端时的动能；若不能返回，求出滑块停在什么位置．

某项目投资预计有三种可能：条件好时可获得1500万元利润；条件一般时可获得600万元利润；条件差时，将亏损1000万元。各种情况发生的概率难以确定，采用合理性标准预测时，该项目期望利润是（）万元。

A．367 

B．633 

C．1033 

D．1100