因为a：b=45，
比的前项和后项同时除以6，则比值不变，
所以所以a6：b6=45；
故答案为：正确．
根据句子意思和所给的首字母，完成单词。
1. Her mother is a nurse and she works in a h_______.
2. My English is p_______. Can you help me with it?
3. Do you k_______ the young man in a white shirt?
4. I'm free tomorrow. I can go for a p_______ with you.
5. Could you please b_______ some food here?
冷凝器和蒸发器对应的过程是怎么样的？
