下列变化属于化学变化的是（ ）
A．冰雪融化
B．瓷碗破碎
C．烟花绽放
D．美酒飘香
A、冰雪融化的过程中只是状态发生改变，没有新物质生成，属于物理变化．
B、瓷碗破碎过程中只是形状发生改变，没有新物质生成，属于物理变化．
C、烟花燃放过程中有新物质二氧化碳等生成，属于化学变化．
D、美酒飘香的过程中只是酒精的状态发生改变，没有新物质生成，属于物理变化．
故选C．
根据短文内容，从方框中选择适当的词，并用其适当形式填空。
My friend Bruce works hard in an office 小题3: Monday to Friday. On weekends, he does something 小题4:. He washes (洗) his car 小题5: Saturdays. And on Sundays he goes to his uncle’s farm with his family 小题6: car. The farm is not big, 小题7: there is much work to do on it. The kids 小题8:help with the animals. Bruce and his wife 小题9: in the field (田地). Then they have a 小题10: dinner in the evening. After dinner, they drive back home. |
，则缆车线路长度至少__________千米。