男,40岁,半年来剧烈活动时诱发胸骨后疼痛,休息数分钟可自行缓解。近3天来发作频繁,

题型:单项选择题

问题:

男,40岁,半年来剧烈活动时诱发胸骨后疼痛,休息数分钟可自行缓解。近3天来发作频繁,且于上楼或步行时均可诱发,夜间也有发作。BP:17.3/l0.6kP日(130/80mmHg),P:60次/分,该患者的最佳治疗方案是

A.硝酸甘油静脉点滴+肝素静脉点滴

B.尿激酶溶栓治疗

C.主动脉内球囊反搏泵

D.消心痛+倍他乐克+阿司匹林口服

E.消心痛+硝苯地平口服

考点:临床执业助理医师内科学冠状动脉粥样硬化性心脏病
题型:单项选择题

根据短文内容,从短文后的选项中选出填入空白处的最佳选项。选项中有两项为多余选项。

     The Mayan Indians lived in Mexico for thousands of years before the Spanish arrived in the 1500s. They

had farms, beautiful palaces, and cities with many buildings. 1_____ This knowledge helped them to live a

better life than most people of that rime, because they could use it to make their life more comfortable and

rewarding.

     In ancient Mexico there were many small clearings in the forest. In each clearing was a village with fields

of corn, beans, and other crops around it. To clear the land for farms, the Maya cut down trees with stone

axes. They planted seeds by digging holes in the ground with pointed sticks. 2_____ 

     The Maya believed in many gods, including rain gods, sun gods, and corn gods. The people built large

temples to honor the Mayan gods, around which cities were built. Today, many of these ancient Mayan cities

and temples are still standing.

     Although the cities were beautiful, and the people worked hard to build them, few of them lived there.

Usually, only the priests lived in the cities. The other people lived in small villages in the forests. They lived in

small huts with no windows. The walls were made of poles covered with dried mud, and the roof was made

of grass or leaves. 3_____ 

     Measuring time was important to the Maya. 4_____ The Maya developed a system for measuring time

accurately. Mayan priests made a system to keep track of time. They made a calendar based on their study

of the sun, moon and stars. The Mayan calendar was far more accurate than the European calendars of the

time.

     Around the year 800, the Maya left their villages and beautiful cities, never to return. 5_____ They may

have died from an infectious disease. They may have left because the soil could no longer grow crops.

Scientists are still trying to find the lost secrets of the Maya. They are still one of our greatest mysteries.

A. No one knows why this happened.

B. Most Maya lived a simple life close to nature.

C. The Maya were an intelligent, culturally rich people,

D. Farmers needed to know when to plant and harvest their crops.

E. They had to fight against natural disasters as common occurrences.

F. One farmer was able to grow crops producing food for several people.

G. The Mayan people knew a lot about nature and the world around them.

题型:单项选择题

如图所示,AB为1/4圆弧轨道,半径为R=0.8m,BC是水平轨道,长S=3m,BC处的摩擦系数为μ=1/15,今有质量m=1kg的物体,自A点从静止起下滑到C点刚好停止。求物体在轨道AB段所受的阻力对物体做的功。

题型:单项选择题

在脱氢反应过程中,采用水作为稀释剂的作用是什么?

题型:单项选择题

进口货物的收货人在()委托代理报检单位报检,出口货物的发货人应在()委托代理报检单位报检。

A.收货地;产地和报关地

B.报关地和收货地;产地

C.报关地和收货地;产地和报关地

D.报关地;报关地

题型:单项选择题

空气通过具有一定液体喷淋量的填料时,流量与流经填料的压强差△P呈何关系?()

A.在对数坐标呈直线关系

B.在对数坐标呈折线关系

C.在对数坐标呈曲线关系

D.没关系

更多题库