问题 问答题 简答题

简答黄瓜各生育时期的生长特点及栽培管理原则?

答案

参考答案:

(1)发芽期:此期生长所需养分靠种子供给要求出土前给予较高的温湿度和充足的光照,使种子迅速发芽出土,出土后适当控制温度,促进子叶发育,防止幼茎徒长,为培育壮苗奠定基础。

(2)幼苗期:此期进行营养器官生长和花芽分化的时期,应创造良好的条件,要求温度与肥水管理方面本着促、控结合的原则进行、

(3)初花期:茎蔓明显伸长,花芽继续形成,花数不断增加,要求结合浇水追肥,加强中耕,进行蹲苗。

(4)结果期,果实大量形成和营养生长达到最高峰期,连续开花结果,栽培中要尽可能延长,要求及时供应充足的水分和养分,加强日常管理,减少病虫害发生。

(5)衰老期:根系吸收能力减弱,开始枯黄,病害大发生,植株衰老,出现畸形瓜,要求采取保秧,防止衰老的措施延长结果期。

阅读理解

阅读理解

    When many of us take a vacation, relaxing is what we want.But we usually return home tired and weak.

It doesn't have to be this way.

     Come home refreshed after an active trip!Don't be too tired!

     Active vacations are often the most relaxing of all.It's all in defining(定义) what an active vacation is.

We don't expect you to run slowly, or go backpacking.Well, we ask the vacationers who are not active

not to sit too long but to spend two to four hours a day doing things, such as walking the city streets,

exploring a nature protect, going to a zoo or biking along the ocean.

     These kinds of activities aren't just good for your physical health.They improve your mental health,

even your spiritual health.And they make vacations memorable and worthwhile.And after all, isn't that

what you want from your vacation? Here are some fresh ideas to make your vacations as pleasurable as

they are active and healthy.

     A walk at dawn or dusk is necessary.Try to make this a daily routine of life away from home, and

you will ensure yourself both physical and spiritual adding.

    Don't allow yourself to spend your entire time sitting in front of the water.Whether it is the ocean, a

swimming pool, or a tree-lined lake, make sure you get into the water for swimming or games or even

walking. Heck, merely standing in waist-high water is a good exercise, thanks to the action of the water.And you will feel so much more alive!

      Many of us spend a large piece of our vacations on the road, either getting to and from our destinations, or using the car for sightseeing.But no matter how beautiful the scenery is, great, memorable vacations

don't happen in a car seat.Don't wait for tiredness or nature's call to get you to pull over.Frequently get

out and stretch, walk, picnic, shop, visit, and have fun.It's important for your health and energy, and it

makes travelling a lot more active and interesting.

1. The writer writes the text mainly to __________.

A. introduce the relationship between vacations and health

B. tell us how to make our vacations relaxing

C. show us where we should go for our vacations

D. explain to us why we feel tired when traveling

2. What does the underlined word "refreshed" in Paragraph 2 mean?

A. Full and excited. 

B. Pleasant but tired.

C. Feeling less tired.  

D. Feeling regretted.

3. What advantage can "the activities" in Paragraph 5 bring?

A. They can improve our health as well as making us feel easy.

B. They just can keep us feel excited and confident.

C. They can bring us more chances to get out.

D. They can save us much time and make the trip meaningful.

4. In the last paragraph, the writer seems to advise us to __________.

A. go on vacation by car

B. not to spend too much time on the road

C. make a trip on foot

D. get out of the car for sightseeing

判断题