问题 问答题 简答题

播种技术的要求?

答案

参考答案:

播种前浇足底水,水渗后撒一薄层细土,小粒种用撒法,大粒种子用点播法。催芽的种子表面潮湿,不易撒开,可用细沙拌匀后再撒播。播后覆土,覆土厚度,小粒种子0.5~1cm大粒种子1~2cm。覆盖地膜,增温保湿,幼苗出土时,去掉地膜。为了预防苗期病害,可采取药土处理,方法是按每平方米多菌灵8g或代森锌8g对15kg细土,先将1/3药土铺到播种床土上,播完种后,再将剩下2/3药土盖在种子上面,覆土厚度不足时,再盖上些苗土,做到使药土“下铺上盖”。

单项选择题

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

The eighteenth-century author Jonathan Swift once suggested in a satiric essay Irish farmers could eat their children to address the twin problems of overpopulation and lack of food.()

A. Irish farmers could eat their children to address the twin problems of overpopulation and lack of food

B. that the twin problems of overpopulation and lacking food could be addressed by the eating of children by Irish farmers

C. of the twin problems of Irish farmers, overpopulation and a lack of food, could be addressed by the eating of their children

D. that Irish farmers could address the twin problems of overpopulation and lack of food by eating their children

E. that Irish farmers, facing overpopulation and lacking food, could address the twin problems through eating their children

判断题