中国民主革命的基本任务是A．进行反帝反封建的民族民主革命，求得民族独立和人民解放 B

民族融合的含义是

A．各民族间人民杂居相处

B．民族间相互学习，取长补短，共同发展

C．多民族国家由分裂走向统一

D．各民族人民通婚

腮腺导管口的位置在（）

A.平对上颌第一磨牙牙冠的颊黏膜上

B.平对下颌第一磨牙牙冠的颊黏膜上

C.正中位时，平对第一磨牙的咬合线处的颊黏膜上

D.平对上颌第二磨牙牙冠的颊黏膜上

E.舌下肉阜处

Welcome to the zoo, everyone! I'm glad to take you around the zoo on such a beatiful day. I'm Jane, and I am a middle school student.Today,I am a volunteer(志愿者） in the zoo. First of all, I want you to know some rules while you are enjoying yourselves in the zoo‎.

1.Please do not give food to the animals.

2.Please leave your bicycles,skateboards,ects.outside the zoo.

3.Do not go into the green areas.

4.Please don't take your pet animals into the zoo.

5.Chilren under 12 years old must stay with their adults(成年人）.

6.You can take pictures in the zoo.

Now let me tell you our plan for today.First of all,we will visit the Lion Park on a minibus.Next is the Monkey Park.There are lots of clever and lovely monkeys.Then we'll walk to the Bird World.You can see many kinds of birds there.After that we'll go to a famous place,the Panda Park.Thank you!I hope you'll have a wonderful day.

小题1:You mustn't give _____________________ to the animals.

小题2:You should leave your bicycles ___________________ the zoo.

小题3:Children under __________________ should go together with their adults.

小题4:You can't take your ___________________ animals into the zoo.

小题5:The tour guide will take the visitors to the Lion Park on a _______________________.

叠罗汉是一种二人以上层层叠成各种造型的游戏娱乐形式，也是一种高难度的杂技。图示为六人叠成的三层静态造塑，假设每个人的重量均为G，下面五人的背部均呈水平状态，则最底层正中间的人的一只脚对水平地面的压力约为（）

A.

B.

C.

D.

影响和制约同行业内企业之间竞争的因素有哪些？