问题
单项选择题
喷吹粒煤与喷吹粉煤相比，（）。
A．制粉成本降低
B．有利煤的燃烧
C．有利炉况顺行
答案
参考答案：A
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喷吹粒煤与喷吹粉煤相比，（）。
A．制粉成本降低
B．有利煤的燃烧
C．有利炉况顺行
参考答案：A
| 阅读短文，然后根据内容从方框中选中10个单词，并用其适当形式填空。 | |
lot about these birds. They will often come _____ to on the beach when you are eating anything. If you _____ a piece of bread to them ,they soon snatched (抓住) it up. Seagulls swim well, but they do not often dive for fish. They are also good at _____ with their large wings. When a seagull is flying, he _____ his legs under his body. Tom often watched them _____ closer to the ground because he liked the way they _____ the air with their wings and brought down their feet before they _____ the ground. Mary liked to see them gliding (滑翔) over the sea as they often do, without their _____ moving, but she said she didn't like the noise they make. |