问题
单项选择题
一项工程，甲单独完成需12天，乙单独完成需9天，若甲先做若干天后，改由乙接着做，共用10天完成，则甲做的天数是：（）
A．6
B．5
C．3
D．4
答案
参考答案：D
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一项工程，甲单独完成需12天，乙单独完成需9天，若甲先做若干天后，改由乙接着做，共用10天完成，则甲做的天数是：（）
A．6
B．5
C．3
D．4
参考答案：D
| 根据A 栏中的对话在B栏中选出相应的答案。 |
| ( )1. What's the weather like? ( )2. Have an apple, please. ( )3. Would you like to go with me? ( )4. Where are they from? ( )5. Do you always get up at six? ( )6. Are you guessing English? ( )7. What's for supper? ( )8. Are you ready? ( )9. What's the temperature outside? ( )10. What time is it? | A. Yes, we are. B. It's seven. C. It's fine. D. Yes. I'd love to. E. Thanks a lot. F. They are from American. G. Yes, I do. H. Fish and chicken. I. I'm coming. J. It's twenty degrees. |