一个数的亿位、万位和个位都是8，其余各位数是0，这个数写作______．
这个数写作：800080008．
故答案为：800080008．
—Will you read me a story ,Mummy?
—OK.You________ have one if you go to bed as soon as possible.[ ]
A. might
B. must
C. could
D. shall
高压变频器功率单元有哪几部分组成？
