万能防喷器为什么不能长期封井？
参考答案：一则胶芯易过早损坏，二则无锁紧装置。
With the development of agriculture, the people ________ village I taught are now living a happy life.
A．in whose
B．whose
C．in which
D．which
账户和会计科目的联系和区别是什么
