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问题 单项选择题 A1型题

有关小儿腹泻病的描述，错误的是（）

A.多病原、多因素引起

B.以大便次数增多、大便性状改变为特点

C.可引起儿童营养不良

D.是引起儿童死亡的重要原因之一

E.细菌是引起儿童腹泻的主要病原

答案

参考答案：E

解析：腹泻病为多因素、多病原引起的、以大便次数增加和大便性状改变为主要表现的综合征。根据大便性状和大便常规有无白细胞将腹泻分为侵袭性细菌肠炎、非侵袭性肠炎；测定血生化了解有无低Na、低K、低Ca等电解质紊乱；血气分析有助于判断有无酸碱平衡失调。

单项选择题

Why do airplanes take longer to fly west than east

It can take five hours to go west-east from New York(NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon known as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes moving at a constant air speed thus go faster in the west- east direction when they are moving with the wind than in the opposite direction.

2. What would happen if the gravity on Earth was suddenly turned off

Supposing we could magically turn off gravity. Would buildings and other structures (建筑物) float away What happened would depend on how ply the things were attached to the Earth, The Earth is moving at quite a speed, moving at over a thousand miles per hours. If you turn something around your head on a string(细绳) , it goes around in a circle until you let go of the string. Then it flies off in a straight line. ’ Switching off’ gravity would be like letting go of the string. Things not attached to the Earth would fly off in a straight line. People in buildings would suddenly shoot up-wards at a great speed until they hit the ceiling. Most things outside would fly off into space.

What information can we get from the first passage（）

A. It is the jet stream that affects how fast airplanes fly

B. Planes go slower when they are moving with the wind

C. It takes more time to fly from NY to London than from London to NY

D. The jet stream always blows from the east to the west across the Atlantic
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单项选择题 A1型题

关于临终关怀符合伦理学的原因，说法错误的是（）

A.可以减轻家庭的经济负担

B.提高病人的生命质量

C.可以缩短病人的痛苦的生命时限

D.客观上可以节约卫生资源

E.为了人类文明的进步
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