假冒他人专利，是指未经专利人许可，在自己的商品或其包装或相关的广告宣传中使用他人的专利标记或专利号，使人误认该产品是他人的专利产品的行为。（）
参考答案：对
.– She was in clas on Friday afternoon, but no one has seen her since.
---She _____ an accident.
A．might have
B．might have had
C．may have
D．ought to have had
一般仪表的死区用输入量程的（）来表达。
A、整数
B、分数
C、小数
D、百分数
