【判断题】链传动能保证准确的平均传动比,传动功率较大。
【简答题】Recently, one of my best friends Jennie, with whom I have shared just about everything since the first day of kindergarten, spent the weekend with me. Since I moved to a new town several years ago, we...
【判断题】链传动能保证准确的平均传动比传动功率较大。
【简答题】Dear Eric: Linda and I have been best friends since we were six years old. We often study and play together. It’s great! But she often gets unhappy when I get better grades than her –she really ge...
【简答题】No. 5 Questions 6 to 10 are based on the following passage Recently, one of my best friends Jennie, with whom I have shared just about everything since the first day of kindergarten, spent the weekend...
【简答题】用适当的时态填空: 1.She’s _____________ (live) here ever since she was ten. 2.Both of them ________________ (be) in Hongkong for ten days. 3.Both of them ____________ (come) to Hongkong ten days ago. 4. Half ...