填空题

For pesticides that are effective for only 2 years, their effects on the soil ends alter 2 years.

【参考答案】

N

<上一题目录下一题>

热门试题

填空题

The drinking water was polluted by the toxins that had seeped into soils and groundwater.

填空题

The pesticide manufacturers have organized an international federation called ______.