问题
填空题
一静止的物块沿光滑斜面匀加速下滑L时，末速度为v，当物体下滑速度达到v/2时，它沿斜面下滑的长度________________。
答案
L/4
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一静止的物块沿光滑斜面匀加速下滑L时，末速度为v，当物体下滑速度达到v/2时，它沿斜面下滑的长度________________。
L/4
| 从方框中选择恰当的词或短语填空.每个只能用一次。 | |
2.I am so sorry that I ________ you ________ my sister just now. 3.___________, many wild animals are in danger. 4._______tomorrow _______, the workers are beginning to rebuild their homes. 5.China is becoming stronger and stronger now. So we _____________ being Chinese. 6.The Internet makes our life nicer, easier and ____________________. 7.How amazing! I saw a UFO _______________ my head at this time yesterday. 8.The Great Wall is one of the greatest ___________ of the world. 9.Tom is a good student. ________________, he often does his homework very well. 10. I'm not sure __________ it will be rainy __________ tomorrow. |