问题 问答题 简答题

光强度对茶树的生育及茶叶品质有何影响?生产上如何控制?

答案

参考答案:

茶树的光合作用强弱很大程度上取决于光照强度。光照强度是影响茶树生育的主要方面。茶树的生物产量90—95/%是叶片利用二氧化碳和水,通过光合作用合成的,而茶叶的经济产量主要依赖光合作用。茶树具有耐阴特征,适度降低光照强度如适度遮阴可以明显提高净光合率,可提高茶叶中氨基酸总量,芽梢含水量高,持嫩性强。新梢中精氨酸、咖啡碱和根部的氨基酸合成量增加,茶氨酸向新梢聚集,有利于提高绿茶品质。适度遮阴对红茶的香度和鲜爽度也有利。

在生产上,可采用如下方法:

①种植遮荫树;②选育不同株型的品种;③调节种植密度;④合理布置茶行方向;⑤修剪树型。

写作题

阅读下面的短文 ,然后按照要求写一篇150词的英语短文。

     Parents in China are so devoted to their children. Recently a man has quit his job at an insurance firm

where he could earn over 3,000 yuan working as an insurance agent. Now he has taken up a far lower-paying

one at his son's university dormitory, only to help his son with his studies.

     Sun decided to do so when his son told him that postgraduate campus life was tough and he was

considering giving up further studies. Sun immediately resigned from his job and became a dormi tory

attendant at his son's university, a job that fetches him a meager 800 yuan a month, to make sure that his son

does not hang up his bag anytime soon.

      He said his son had great pressure these days and had no clear goal. He works here and he has the chance

to chat with him and they often do sports. Sun regards his son as the most important person in his life and he

would rather do all for him. But he claimed he wouldn't stay in the university for two years.

     [写作内容] 1.以约30个词概括这段短文的内容;

                      2.然后以约120个词就“父母是否应该陪读大学生子女” 进行议论

     内容包括: (1)你是否支持这位父亲的做法,并说明理由; 

                        (2)你认为孩子的独立性很重要吗,并说明理由;

                        (3)你认为父母应该在孩子最需要帮助的时候伸出援手吗(你认为孩子应该依靠自

                             己获得独立性吗)。

     [写作要求] 1.可以使用实例或其他论述方法支持你的观点,也可以参照阅读材料的内容但不

                         得直接引用原文中的句子;

                       2.标题自拟。 提示:陪读大学生子女accompany children studying at uni- versity

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