叙述并指出翳风、肩贞、腰痛穴的定位

阅读理解。

     My name is Nicky. I've been a travel writer for twenty years now. It's a really interesting life. I was

only twenty-one when I started traveling. The first country I went to was Mexico. At first, I studied

Spanish for six months in Mexico City. Then I traveled to other parts of Mexico, and all over South

America. My favorite country was Peru. It has everything-great beaches, tall mountains, and forests

with lots of strange and wonderful animals. Brazil is the only South American country I've never visited,

but I'm a great fan of their football team! I hope to watch a football match in Brazil one day.

    What other countries have I been to? Well, I've been to most parts of Asia. I spent three years in

China, and I lived in India for five years. However, I've never been to Japan. My friends tell me it's

really expensive there. I like to spend my time in cheaper countries. At the moment, I'm living in Vietnam.

It's a beautiful country, and the people are very friendly. I've been living here for two years now, and I

love it!

根据短文内容，回答下列问题。

1. Why does Nicky like being a travel writer?

   ____________________________________________________________________________

2. How long did Nicky spend in Mexico City?

   ____________________________________________________________________________

3. Which part of South America has Nicky never been to?

   ____________________________________________________________________________

4. Why has Nicky never been to Japan?

   ____________________________________________________________________________

5. Why does Nicky like to live in Vietnam?

   ____________________________________________________________________________

患者男，42岁。因“反复心前区疼痛2年，伴气短6个月”来诊。既往史无特殊。查体：T36.5℃，P95次/min，R28次/min，BP108/65mmHg。口唇无发绀，颈静脉怒张。HR95次/min，律不齐，偶有期前收缩，肺动脉瓣听诊区第二心音增强，胸骨右缘第3肋间可闻及持续的机械性杂音。双下肢轻度水肿。

为明确诊断应进行的检查项目包括（）

A.心电图

B.胸部X线片

C.血常规

D.肺功能检查

E.血生化

F.超声心动图

先化简，再求值：(a²b-2ab²-b³)÷b-(a+b)(a-b)，其中

关于桩冠修复的要求下述哪一项正确

A．牙根越多越牢固

B．桩径2mm以上

C．桩长应为根长1/2

D．桩长应为根长2/3

E．桩长最多等于根长

牙体缺损修复时，增加抗力形的措施，除了

A．消除薄壁弱尖

B．消除无基釉柱

C．尽量保护牙髓

D．均匀分散力

E．选用理化性能好的材料