【】主空气瓶至少有2个,其容量应在不充气时,保证每换向主机从连续起动不少于6次,试验时倒车交替进行,对每台不能换向的主机能从连续起动不少于12次。 A. 对 B. 错
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【简答题】听录音,选择正确答案。 ( )1. A. In the kitchen. ( )2. A. It's a bag. ( )3. A. It's six o'clock. ( )4. A. It's red. ( )5. A. It's a camera. ( )6. A. She's my aunt. B. She's a teacher. B. T...
【简答题】阅读下面的短文,按要求选择正确答案。 It's nine o'clock in the morning. The family is at home. Jim's father is sitting in a chair. He's watching TV. Jim's mother is standing near the window. She's giving some food to a ...
【简答题】阅读理解。 It's nine o'clock in the evening. The family are at home. Jim's father is sitting in a chair. He's watching TV. His mother is standing near the window. She's giving some food to Polly. Polly say...