给煤机在正常运行中应（）均匀，调速平稳，行车良好，转速表、（）不超过额定值。
参考答案：给煤；电流
以下液化气体中，有毒的是（）。
句型转换
1. Jane isn't good at Science, I think. (宾语从句)
I ______ think Jane ______ ______ at Science.
2. The woman who is talking with our head teacher is my mother. (同义句)
The woman ______ ______ our head teacher is my mother.
3. He doesn't know what he should do with the matter. (同义句)
He doesn't know what _____ ______ with the matter.
4. The girl with some flowers in her hand is my sister. (改为单句)
The girl ______ ______ some flowers in her hand is my sister.
5. My parents usually buy me some simple clothes.
The clothes can last a long time. (合并为一句)
My parents usually buy me some simple clothes ______ can last a long time.
