外观设计应该能够应用于产业上并形成批量生产，只要一项外观设计在理论上能够通过工业方法可以重复再现即可，并不要求其实际进行了批量生产。（）
参考答案：对
— Have you told Joan the bad news that her grandfather fell off the bike and hurt seriously?
— Yes. I told her ________I saw her this afternoon. [ ]
A. while
B. the moment
C. until
D. suddenly
逆查法的特点及优缺点各是什么？
