分析我市的社区设置了哪些组织机构？

Healthy teeth are important in many ways. For example, when we get our pictures taken, everyone says “Say cheese!” So we open our mouth and show our teeth.

小题1:Strong and healthy teeth help us chew the right food to grow. They also help us speak clearly and look our best. 小题2:我们必须照顾好我们的牙齿。What should we do to protect our teeth?

First, we should brush them at least twice a day—after breakfast and before bedtime. We should brush all of our teeth, not just the front ones. 小题3: We should spend at least 3 minutes each time brushing teeth.

小题4:一年看两次牙医也很重要。Besides checking for disease, the dentist will help keep our teeth extra clean.

小题5:We also need to be careful about what we eat and drink. Remember to eat more vegetables and fruit and drink more water. Of course, don’t forget to smile!

增值税和个人所得税是我们目前影响很大的两个税种，下列有关我国增值税和个人所得税的说法正确的是 [ ]

①增值税对增值额征税 ，个人所得税对营业额征税②个人所得税和增值税都属于流转税 ③个人所得税实行超额累进税率和比例税率，增值税实行固定税率④增值税有利于促进生产的专业化和公平竞争，个人所得税有利于实现社会公平

A．②③              

B．②④              

C．①④              

D．③④

（6分）如图所示，是研究“滑动摩擦力与什么因素有关”的实验装置图。则：

（1）如图a、b、c所示，把长方体木块平放在水平桌面上，用弹簧测力计沿水平方向用逐渐增大的拉力拉木块，但木块始终保持静止状态，分别记下三种情况下弹簧测力计的示数。根据实验可以得出的结论是：木块和水平桌面间的静摩擦力随着拉力的增大而       。

（2）由图可知，木块和水平桌面间的滑动摩擦力为    N。当用弹簧测力计拉着木块做匀速直线运动时，如果木块有1/3伸出到桌面边缘外，那么，此时滑动摩擦力的大小为     N。

主要由下丘脑产生，其他部位也可产生的是（）

A．生长素释放抑制激素

B．降钙素

C．1，25-（OH）2-VD3

D．生长激素

E．生长素介质