患者王某，有心绞痛发作史，心电图ST段降低，T波倒置，超声显像检查疑有室壁运动异常，

发布时间：2019-05-24 19:24 │ 来源：www.tikuol.com

题型：单项选择题

问题：

患者王某，有心绞痛发作史，心电图ST段降低，T波倒置，超声显像检查疑有室壁运动异常，需作心肌超声造影，你准备的经末梢静脉造影根据什么原理

A．微气泡直径小于红细胞，但人于8μm以上
B．选择压缩系数小于液体、固体的微气泡
C．微气泡较大，从末梢静脉进入右心
D．选择密度大于固体的微气泡E．微气泡直径小于5μm

考点：超声波医学主治医师超声医学基础知识超声医学科主治医师

题型：单项选择题

阅读理解。

                                          For Children
Museum: Children's Museum, Sundays, 89 North Main Street, 67641235
Story time: Children's Library, 106 Green Street, Wednesdays during
                 9:30 a.m.-5:00 p.m., 66899624
Sports: Soccer Club, Tuesdays and Thursdays, 16 Yangtze Road, 96725624
           Basketball Club, Wednesdays and Fridays, 79071632
Cinema: New films for children, 99 Brick Road, 69001354

Useful Phone Numbers
Hospital: 68787451
Visitor Information Center:800-120-9847
Taxi: 79210583
Visitor Hotel Information: 800-739-7302

1．It's Friday afternoon, you can go to _______.

A. visit the museum
B. play soccer
C. play basketball
D. read children's stories

2．If children want to watch new films, they should go to _______.

A. 16 Yangtze Road
B. 89 North Main Street
C. 106 Green Street
D. 99 Brick Road

3．If you call 66899624, you can _______.

A. ask for some hotel information
B. do some shopping
C. have a good story time
D. order fast food in a restaurant

4．Lily's father is ill. She should call _______.

A. 800-120-9847
B. 79210583
C. 68787451
D. 96725643

5．You can not get any information about _______ from the two notices.

A. looking for a hotel
B. doing eye exercises
C. eating fast food
D. taking a taxi

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电路是由一些（）按一定方式组合起来，以实现某一特定功能的电流的通路。

A、电阻

B、电机

C、电容

D、电气设备或器件

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抽样研究中，σ为定值，若逐渐增大样本例数，则样本（）

A.标准差减小

B.当η趋近无穷大时，标准差降至0

C.标准误减小

D.标准误波动范围增大

E.标准误、标准差都不改变

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不需要单独保管的药物是：（）

A．洋金花

B．火硝

C．麝香

D．黄芪

E．人参

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美术涂料表面不同颜色的线条，应横平竖直，均匀一致，全长的允许误差不得大于（），搭接错位不得大于0.5mm。

A、1mm

B、2mm

C、2.5mm

D、3mm

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