医生为了给患者输液,用网兜把药瓶倒挂在支架上,瓶口插有输液管和空气管,如图所示。

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问题:

医生为了给患者输液,用网兜把药瓶倒挂在支架上,瓶口插有输液管和空气管,如图所示。输液过程中,下列说法正确的是

[ ]

A.如果血液回流到输液管中,可将药瓶适当的升高

B.瓶内药液对瓶盖的压强越来越大

C.瓶内上方气体的压强始终不变

D.空气管中的空气与药液接触处的压强等于大气压

考点:大气压强的测量(托里拆利实验)
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满足条件|z|=|3+4i|的复数z在复平面上对应点的轨迹是 [ ]

A.一条直线

B.两条直线

C.圆

D.椭圆

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The days of elderly women doing nothing but cooking huge meals on holidays are gone. Enter the Red Hat Society--a group holding the belief that old ladies should have fun.

"My grandmothers didn’ t do anything but keep house and serve everybody. They were programmed to do that," said Emily Cornette, head of a chapter of the 7-year-old Red Hat Society.

While men have long spent their time fishing and playing golf, women have sometimes seemed to become unnoticed as they age. But the generation now turning 50 is the baby boomers(生育高峰期出生的人), and the same people who refused their parents’ way of being young are now trying a new way of growing old.

If you take into consideration feminism(女权主义), a bit of spare money, and better health for most elderly, the Red Hat Society looks almost inevitable(必然的). In this society, women over 50 wear red hats and purple(紫色的) clothes, while the women under 50 wear pink hats and light purple clothing.

"The organization took the idea from a poem by Jenny Joseph that begins: When I am an old woman, I shall wear purple. With a red hat which doesn’ t go," said Ellen Cooper, who founded the Red Hat Society in 1998. When the ladies started to wear the red hats, they attracted lots of attention.

"The point of this is that we need a rest from always doing something for someone else," Cooper said, "Women feel so ashamed and sorry when they do something for themselves. " This is why chapters are discouraged from raising money or doing anything useful. "We’ re a ladies’ play group. It couldn’ t be more simple," added Cooper’ s assistant Joe Heywood.

Women join the Red Hat Society because()

A. they want to stay young

B. they would like to appear more attractive

C. they would like to have fun and live for themselves

D. they want to be more like their parents

题型:多选题

肾先天性发育异常包括()

A.肾数目异常

B.肾位置异常

C.肾形态异常

D.肾旋转异常

E.肾发育不全

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激光唱机是利用()

A.激光束来读取信息的

B.电磁转换原理来记录信息的

C.磁电转换原理来读取信息的

D.磁头作为记录和读取信息的器件

题型:多选题

思想政治教育必须遵循()及积极推进改进创新的原则。

A.坚持科学理论指导

B.贯彻以人为本要求

C.围绕中心服务大局

D.注重增强实际效果

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