请你以“How to be popular”为题，写一篇英语短文。词数100左右，文章的题目和开头已给出，不计词数。   

要点提示：1．衣着干净、整齐，保持微笑；   

2．诚实，乐于助人；   

3．懂得与他人合作；   

4．其它。   

How to be popular

Most people would like to be popular with others，but what is the secret to achieve popularity? In fact，it is very simple．   

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关于肺部CT扫描技术的描述，错误的是

A．扫描层厚的选择应小于病灶直径

B．屏气不佳可增加图像的运动伪影

C．肺间质病变应选薄层高分辨率扫描模式

D．增强扫描的扫描模式和参数须与平扫相同

E．增强扫描欲观察细微结构时应选用高分辨率扫描模式