甲对乙的实用新型专利权提出无效宣告请求，甲提供的证据仅为证人张某在公证人员面前作出书面证言的公证书原件，内容为张某在涉案专利申请日前购买了与涉案专利相同的空调。在口头审理中张某未出庭作证，专利复审委员会当庭调查发现张某不属于确有困难不能出席口头审理作证的情形。下列说法正确的是？（）
A.甲提供了该公证书原件，在没有其他证据推翻的情况下，一般应当认定该公证书的真实性
B.该公证书是由公证人员作出，因此该公证书能证明张某在涉案专利申请日前确实购买过空调
C.该公证书是由公证人员作出，因此该公证书能证明张某在涉案专利申请日前确实购买了与涉案专利相同的空调
D.张某未出席口头审理进行作证，其书面证言不能单独作为认定案件事实的依据
参考答案：A, D
According to a new survey, students’ safety has become a big problem. Now in some cities of China, many schools start a new lesson: self-protection. Students like this lesson because there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens. Lin Li, a teacher from Yantai, gives young students some advice on how to deal with danger. If you are in a traffic accident If a car hits you, you should remember the car number. If it is a bicycle, try to call your parents before you let the rider go. This is because you don’t know how seriously you are hurt. If it is raining hard and there is lightning Don’t stay in high places and stay away from trees. When there is a fire Get away as fast as you can. Put wet things on your body and try to find an exit. Don’t take the lift. If someone is drowning If you can’t swim, don’t get into water. Cry out for help. Remember that danger is never as far away as you think. Take care or yourself at all times! If you are robbed (抢劫) Keep calm. If you can not cry for help or run away, give the robber your money. Try to remember what the robber looks like and tell the police later. 根据文章内容，完成下列表格。
| ||||||||||||||