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?