男，40岁。2小时前突然感剧烈头痛，伴喷射性呕吐。查体：神志清楚，颅神经正常。四肢肌

若一件商品的进价为500元，标价为750元，商店要求以利润率不低于5%的售价打折出售，问售货员最低打几折出售此商品设打x折，用不等式表示题目中的不等关系．

阅读理解。

     The nervous-looking young man had waited for a few moments outside the jeweler's before he got enough

courage to enter. He was warmly greeted by a young assistant. James felt a rush of blood to his face as he

explained he would be bringing in his future wife to choose a birthday present. The assistant listened carefully

and told him he'd better buy a necklace (项链). He wasn't used to buying jewelry and was a little worried about

overspending, because he was not very rich. After some discussion as to a reasonable price and the type, the

assistant showed him dozens of necklaces and helped him to choose. At last James chose one and left the shop

promising to return at five o'clock. Half an hour later than planned, James did return to the shop with his future

wife, Laura. The assistant acted as if she had never seen him before. When she was asked to show them some

necklaces, she first brought out some inexpensive ones for them to choose, and then gave them the ones she

had prepared. A choice was soon made and they went away satisfactorily. Later James would certainly come

back to buy what he wanted when he got married.

1. The good title for this passage is " _____". [ ]

A. A Clever Assistant.

B. Buying a Birthday Present

C. How to Choose a Necklace

D. A Brave Young Man

2. The word "overspending" in the passage means _____. [ ]

A. spending too much energy

B. spending too much time

C. spending more time than he planned

D. spending too much money

3. When James told the assistant why he wanted to buy a present, his face _____. [ ]

A. turned pale

B. turned red

C. turned yellow

D. turned black

4. James and Laura reached the shop at _____. [ ]

A. 4:30

B. 5:00

C. 5:30

D. 6:00

现实当中，人们的许多活动、做法都跟我们学过的物理知识有关，下列对涉及压强和浮力的事例论述不正确的是[ ]

A．人们呼吸过程中隐含的物理知识有气体压强跟体积的关系

B．石头扔进河里会沉入水底说明石头在水中不受浮力

C．三峡船闸利用了连通器的原理

D．拦河坝坝堤筑成上窄下宽是因为坝里的水的压强随深度增大而增大

武汉社保卡如何解锁？

简述居民自治性组织的类型。