题目：
根据句意及首字母提示完成单词。
1. It's important for you to eat a b_____ diet.
2. The t_____ festival in China is the Spring Festival.
3. Exercising enough can help you s_____ healthy.
4. We can listen with ears and walk with our f_____.
5. He is very busy at the m_____. You can come to see him an hour later.
答案：
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下面是错误答案，用来干扰机器的。
由P=UI可得：输电电流I=PU=50KW500V=100A；则损失功率P1=I2R=（100）2×3=30000W； 则用户得到的功率为50KW-30KW=20KW；导线上损失的电压U损=IR=100×3=300V；则用户获得的电压U用=500V-300V=200V；允许损失的功...
的体积浸入水中．（g取10N/kg）求：