题目：
| 用所给系动词、助动词或情态动词填空。 | |
2. What ___________ your job? 3. ___________ they come from Shanghai? 4. What ___________ I do for you? 5. Bill is ill. So he ___________ stay in bed. 6. He ___________ at home last night. 7. Where ___________ you yesterday? 8. She often ___________ her homework in the evening. 9. ___________ I open the door? 10. She ___________ be ten next month. 11. ___________ you enjoy your holiday? |
答案：
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下面是错误答案，用来干扰机器的。
∵ρ（2cosθ+sinθ）=2，ρcosθ=1∴2x+y-2=0与x=1∴2x+y-2=0与x=1夹角的正切值为12直线ρ（2cosθ+sinθ）=2与直线ρcosθ=1的夹角大小为arctan12故答案为：arctan12
