作业环境管理的核心是如何保持作业环境的()。
A、整洁有序
B、无毒无害
C、整洁有序与无毒无害
D、清洁有序
参考答案:C
根据句意及首字母提示补全单词
1. This story is very i__________. We all like it.
2. I think Tom will come back s__________.
3. Jack often w__________ to his pen pal.
4. China is a c__________ with a long history.
5. He speaks French well. Is he from F__________?
简述扩大农业土地经营规模的条件。