根据短文内容和首字母的提示，把所缺单词填写在短文后面的横线上。

     In the (1) m______ world, advertising is everywhere! Some people think that ads are great. Others

(2) h______ ads, saying that they make our cities and countryside look ugly. Many ads are (3) a______

specifically at teenagers, and some young people see more than 100 advertisements a day. It's true that

some ads can be very useful! For instance, they can help you to compare two different products so that

you can buy the (4)o______ you really need. They can also help you (5)s______ money. When prices are

listed, you can go to the store with the (6)l______ price.

X线机常用的高压整流方式不包括

A．单相半波整流
B．单相全波整流
C．三相六管整流
D．三相十二管整流
E．三相八管整流