相似的 2. 精力充沛的 3. 积极地 查看更多

 

题目列表(包括答案和解析)

萘乙酸(NAA)是科学家通过化学的方法合成和筛选的在结构和生理作用方面与生长素相似的物质,其生理作用也与浓度密切相关,探究萘乙酸(NAA)对扦插枝条生根作用的最佳浓度范围,在农业生产的应用上具有非常重要的意义。
 一、实验原理:
萘乙酸与生长素一样,对植物生长的调节作用具有___________________________性,即
_______________________________________________________________。(2分)
二、实验过程与方法:
(1)取材;取山茶花植株生长良好的半木质枝条,剪成5—7cm,每段插条芽数相同。
(2)实验:①将插条分别用不同的方法处理如图1;②将处理过的插条下端浸在清水中,注意保持温度(25~30℃)。
(3)记录:小组分工,根据实验数据,建立数学模型如图2。
三、结果分析与评价:
(1)从图2中,可得出的结论是_________________________________________          
(2)插条若没有生出不定根,其原因最可能是____________________________            
(3)温度、处理时间等要一致,其原因是_________________________________           
(4)每组都选取10根插条,其目的是____________________________________           

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完成句子

相同星座的人往往有相似的特点。

People ________ ________ the same star sign have ________ characteristics.

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The bicycle is really and important means of transportation in China.Bicyclese have become more and more popular in China.People ride bikes to their workplaces,to shopping centers,to schools,and so on.During the rush hour,you can often see a boiling sea of bicycles running in all directions.With the largest number of bike riders in the world,China is often referred to as the kingdom of bicycles.There are many advantages(优点) about the bicycle.For example,bicycles do not cause air or sound pollution(污染);compared with cars,bicycle cause no environmental(环境的) problems;bicycles save energy(能源) and parking place;riding bikes to travel can be a wonderful experience(经历);the bicycle allows us to go anywhere nearby easily;bikes are not very expensive,and almost every family can afford them;riding bikes regularly does good to people's health.

  通读短文,然后根据短文内容回答问题。

1.Why is China called the kingdom of bicycles?

  ______________________________________________________________

2.Can we go anywhere easily by bicycles?

  ______________________________________________________________

3.Why can almost every family afford bicycles?

  ______________________________________________________________

4.What do you think the most popular means of transportation in China is?

  ______________________________________________________________

5.What are the advantages of the bicycles?You can give one or two examples.

  ______________________________________________________________

 

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在下列各小题的横线上,写出相应的诗文名句。(12分)
【小题1】天街小雨润如酥,                          。(韩愈《早春呈水部张十八员外》)
【小题2】居高声自远,                    。(虞世南《蝉》)
【小题3】                       ?烟波江上使人愁。(崔颢《黄鹤楼》)
【小题4】                        ,带月荷锄归。(陶渊明《归园田居》)
【小题5】曲径通幽处,                       。(常建《题破山寺后禅院》)
【小题6】吴楚东南坼,                      。(杜甫《登岳阳楼》)
【小题7】李白《闻王昌龄左迁龙标遥有此寄》中借月抒情的句子是“            
                       ”,这两句诗将月亮人格化,表达了作者对“左迁龙标”王昌龄的关切之情。
【小题8】在你交往的同学中,许多人都是优缺点共存的,怎样对待别人的优缺点?《<论语>八则》中的“                                    ”给了我们正确的回答。
【小题9】《爱莲说》一文中,表现莲花不与世俗同流合污,不孤高自许的句子是:                                                 

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根据图画写出下列单词的英语形式

1.      

2.      

3.___________

4.____________

5.____________

 

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