关于下图中四个省的叙述，不正确的是（） A．①省是我国西南的边疆省，省内少数民

从清管站和防腐站的作用中可以得出这样的结论()

(A)只有前者可以减轻管壁的腐蚀;

(B)只有后者可以减轻管壁的腐蚀;

(C)两者均可以减轻管壁的腐蚀;

(D)两者均不能减轻管壁的腐蚀

第二节根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。选项中有两项为多余选项。E="AB " F="AC    " G="AD    "

—Any good news?

—Not really.   61    I was left behind after school yesterday.

—    62  

—Sometimes I do. The day before yesterday, I was quiet in my history class but I still had to stay after school.

—    63  

—Because I fell asleep. But it wasn’t my fault.   64   

— I advise you to take school more seriously. If you don’t pass your exam, you will have to drop out and work as a result.

—   65    If I have a job, I have to do dull work every day. But I am in school, I must listen to dull teachers every day.

— Something must be wrong with you. Go to the psychologist first.

A．You are lazy.

B．I don’t understand.

C．You made your teacher angry.

D．Better keep quiet in class.E. The lesson is dull.

F. I don’t think it makes much difference.

G. Because I was talking without being asked in class,

结核性脑膜炎最易发生在结核原发感染后（）

A.2～4周以内

B.1～3个月以内

C.3～6个月以内

D.6～12个月以内

E.24个月以内

数据库管理系统的体系结构是______。

A)三级模式结构和一级映像
B)三级模式结构
C)三级模式结构和二级映像
D)三级模式结构和三级映像

滑动摩擦力大小与（）无关，与物体间接触面积大小无关。

A、物体运动的快慢

B、物体的挤压

C、接触面的粗糙度

D、物体运动