问题 问答题 简答题

预防药害的基本原则是什么?

答案

参考答案:

①要充分了解药剂的性质;

②要充分了解药剂的质量;

③除草剂与其它农药最好是分开使用药械;

④提高药剂配制及施药技术水准;

⑤注意被保护作物的类别及不同生育期特点,掌握对药剂敏感的作物种类和作物不同生育期的耐药能力,选择适宜农药产品和剂量,避免药害的发生;

⑥注意施药时的环境条件;

⑦农药混用时,注意所选混配品种对作物的适用性。混用农药中应减少持效期长的农药品种用量,以避免或减少间接药害的发生;

⑧对当地未曾用过的农药,在大面积施用前,必须先进行小区或小面积的药害试验。一定要坚持“先试验.后推广”的原则,取得安全的用药剂量、使用方法和使用时期后、才能大范围推广使用;

⑨对丢失了商品标签又不能肯定是哪一类品种的药剂,绝对不能使用。无生产许可或批准檔号、标准号、登记证号、无商标、无生产厂名和有效期已过的农药制剂,也不能使用,以免出现药害问题和造成不必要的损失;

阅读理解

阅读下面的短文,根据短文内容,判断所给句子胡正误。正确的选择T,错误的选择F。并在答题卡上将T或F字母涂黑。

A teenage girl couldn’t stand her parents’ family rules, so she left home.

She wanted to be famous. But she had poor education and several years later she had to ask for food on the street for a living. Now her father has died. Her mother is an old woman. But she is still looking for her daughter. She has been to every corner of the city. Everywhere she goes, she puts up a big photo of herself on the wall. At the lower part of the photo she writes,” I still love you . . . , come back home!”

One day, the daughter saw one of the photos. The face was familiar(熟悉). “Is that my mother?” she moved closer and read the “still love you ...” She cried. When she got home, it was early morning. She knocked on the door. The door opened itself. She rushed to her mother’s bedroom. Her mother was sleeping. She woke her mother up, “It’s me! Your daughter is back home!” The mother and daughter held each other, full of happy tears. The daughter asked, “Why is the door not locked? A thief could get in.”  The mother answered softly, “The door has never been locked since you left.”

The door of parents’ love for their children will never be closed.

小题1:The girl left home because her parents were cruel(无情的) to her.

小题2:No money caused the girl couldn’t be famous.

小题3:The mother put up her daughter’s photo on the wall so that she could find her daughter.

小题4:When the girl came back home, she couldn’t wait to see her mother.

小题5:From the story we know that parents love their children forever at any time.

单项选择题