大豆胞囊线虫病在沙质土壤中发生较重。
参考答案：对
This firm, forced to leave the Chinese market, has not kept the written promise _______ made before.[ ]
A. that
B. this
C. it
D. one
《铁路交通事故认定书》是（）以及事故责任追究的依据。
A、事故赔偿
B、事故处理
C、事故责任
D、事故调查
