【简答题】We have to go to school at 7:00 am on w .
【单选题】We go to school at 7:30 in the ________.
【简答题】根据短文内容,选择最佳答案。 We go to school at seven thirty. Our classroom is behind the trees. It's very nice. There is a map of China on the wall. Twenty boys and fif girls are in the classroom. There are so...
【单选题】在设计铰链四杆机构时,应使最小传动角()。
【简答题】在______处,髂外动脉延续为股动脉,在______处股动脉延续为胭动脉。