空间存在着平行于x轴方向的静电场，A、M、O、N、B为x轴上的点，OA＜OB，O

发布时间：2017-05-12 01:53 │ 来源：www.tikuol.com

题型：选择题

问题：

空间存在着平行于x轴方向的静电场，A、M、O、N、B为x轴上的点，OA＜OB，OM=ON，一带正电的粒子在AB间的电势能E_p随x的变化规律为如图所示的折线，则下列判断中正确的是（　　）

A．M点电势比N点电势高

B．把该粒子从M向O移动过程中，所受电场力做正功

C．AO间的电场强度小于OB间的电场强度

D．若将一带电负粒子从M点静止释放，它一定能通过N点

考点：电势差与电场强度的关系

题型：选择题

完形填空。

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Access所设计的数据访问页是一个______。

A．独立的外部文件

B．数据库中的表，

C．独立的数据库文件

D．数据库记录的超链接

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患者女性，60岁。3h前胸骨后压榨样疼痛发，伴呕吐、冷汗及濒死感而入院。体格检查：神志清楚，查体合作，心率112次/分，律齐，交替脉，心电图检查显示有急性广泛性前壁心肌梗死。

在监护过程中护士发现患者烦躁不安、面色苍白、皮肤湿冷、脉细速、尿量减少，应警惕发生

A．严重心律失常

B．急性左心衰竭

C．心源性休克

D．并发感染

E．紧张、恐惧

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深部感染真菌包括（）

A.新生隐球菌

B.白色念珠菌

C.曲霉素

D.毛霉素

E.小孢子菌属

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