细胞的生物电现象中，“当静息电位数值向膜内负值加大的方向变化时”称为（） A.复极化

根据短文内容，选择正确答案。

     Alice is an American girl .She is thirteen. She is now in Beijing with her parents. She doesn't know

 much Chinese. She can't speak Chinese well. Sometimes her friends do not understand her.

     It's Sunday morning .She's going to the zoo to see the pandas .She is waiting at the bus station. At the

 bus station she asks a boy how to go to the zoo. But the boy can't understand her. Then she takes out (拿

 出) a pen and some paper. She draws a panda on it and shows the picture to the boy. The boy smiles and

  shows the way to the zoo right now.

1. Alice is in Beijing with her _____.

    A. brother    

    B. sister     

    C. uncle    

    D. father and mother

2. Alice can speak _____ Chinese

    A. much      

    B. little    

    C. few      

    D. many

3. Alice goes to the zoo _____.

    A. on her bike    

    B. on a bus      

    C. in a car    

    D. on a train

4. Alice is going to the zoo to see _____.

    A. her friends   

    B. the tigers    

    C .the monkeys 

    D. the pandas

5. The boy _____.

    A. shows her the way      

    B. doesn't know the way  

    C. goes to the zoo with her  

    D. gives a map to her

用一个圆柱形容器盛水，水高5厘米，将水倒入和它等底等高的圆锥形容器中，水的高度是______厘米．

腮腺炎急性化脓期时，可表现为（）

A.以耳垂为中心，红肿热痛

B.腮腺导管口发红水肿，挤压出脓液

C.体温可高于40℃，白细胞升高，中性白细胞比例高，核左移

D.腮腺区未扪及波动感，而显硬的浸润块

E.同侧眼睑水肿，闭合不能睁开

关于肺动脉CT扫描的描述，错误的是（）

A.可用于肺血管性病变的诊断和鉴别诊断

B.可用于纵隔肿瘤和大血管病变的诊断和鉴别诊断

C.扫描范围一般自胸腔入口到肺下界膈面，或依据病变情况具体确定

D.开始注射对比剂后25～30秒开始扫描

E.常用MIP等图像后处理

0.2，4.04，20.008，（）。

A．48.0032 

B．40.0032 

C．54.0016 

D．61.0214