问题
计算题
一小孩自0.8m高的地方用玩具手枪水平射出一颗子弹，测得子弹的落地距离为20m。求子弹水平射出时的初速度大小。（g取10m/s2）
答案
解：
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一小孩自0.8m高的地方用玩具手枪水平射出一颗子弹，测得子弹的落地距离为20m。求子弹水平射出时的初速度大小。（g取10m/s2）
解：
| 从方框内选出合适的单词并用其正确形式填空 | |
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| 1. Taking a taxi is than taking a bus. 2. Football is the sport in the world. 3. Please walk , or we'II be late for the meeting. 4. Sixty minutes is one 5. I'm going to wait for you at the bus . 6. It will you an hour to do the work. 7. There are lots of on the ship. They are leaving for the USA. 8. The from my home to the station is two kilometres. |