影响工程质量的因素很多，归纳起来主要有五个方面，即4MIE，其中，“IE”指的是( )。
A．材料 B．机械 C．方法 D．环境
参考答案：D
脱粒机脱粒碎粒多是什么原因？
用所给单词的适当形式填空.
1. _____ (do) she live on Center Street?
2. The food market is _____ (open) for 24 hours.
3. It's very far. You can _____ (take) a taxi.
4. Our teacher often _____ (arrive) at school early in the morning.
5. The boy _____ (clean) his classroom every morning.
