题目内容

【题目】根据探索生长素类似物促进插条生根的最适浓度的实验,回答下列问题:

(1)生长素处理插条的方法主要有_____________和沾蘸法。不论哪一种方法,处理的部位都是插条的基部。

(2)实验中应设置空白对照组,该组应用______________处理插条。

(3)实验中要设计多个实验组进行对比。若对要研究的植物有关情况所知不多,需先设计一组溶液浓度梯度_____________的预实验进行摸索,以确定最适浓度大致范围。

(4)实验中对插条处理的时间长短应一致,同一组实验中所用到的植物材料也应尽可能做到条件相同等等,这些做法的目的是控制实验中的______________,确保其相同。

(5)实验中不同浓度生长素类似物对插条的作用效果,可根据处理后插条的 情况来反应。

【答案】

(1)浸泡法

(2)蒸馏水

(3)比较大

(4)无关变量

(5)生根数目和生根长度

【解析】

(1)生长素处理插条的方法主要有浸泡法和沾蘸法。

(2)实验中应以蒸馏水处理插条来设置空白对照组。

(3)若对要研究的植物有关情况所知不多,需先设计一组溶液浓度梯度比较大的预实验进行摸索,以确定最适浓度大致范围。

(4)实验过程应该控制所有的无关变量一致。

(5)实验效果以插条的生根数目和生根长度来反应。

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【题目】B

April 23 marks the 400th anniversary of William Shakespeare’s death. Organizations in Britain have planned numerous events to honor him.

In Stratford-upon-Avon, his birthplace, the tourism organization has a great number of free events, including performances of Shakespeare’s plays, and a dazzling fireworks display. And the BBC is broadcasting a live show from Stratfore-upon-Avon, celebrating Shakespeare’s widespread influence on the world. In England’s capital, the London Shakespeare Centre and King’s College London are holding a series of public performances, exhibitions and activities. It isn’t just England that honors the anniversary of the death of this extraordinary writer. In Washington, D. C., the Folger Shakespeare Library, which houses the world’s largest collection of documents relating to William Shakespeare, is displaying a series of exhibitions.

Shakespeare is probably the most famous author who ever lived and is considered a genius by most. He wrote around 37 plays and 154 sonnets(十四行诗), and his work has been translated into over one hundred languages! He penned beautiful metaphors(暗喻), serious dramas and amusing tales.

Shakespeare also invented many new terms and phrases. If someone’s behavior suggested they were not being honest and should not be trusted, Shakespeare called their actions suspicious. If someone was being silly and perhaps looking like a fool, Shakespeare found their actions laughable. And Shakespeare called people who offered their opinions on the quality of something critics. Today, for instance, food critics and film critics give audiences their opinions of food and film. The familiar phrase “break the ice”/span> comes from Shakespeare’s play The Taming of the Shrew. The “ice is broken” when a difficult conversation or meeting is calmed by some basic introduction, such as a simple game. More common words coined by Shakespeare include road, gossip, lonely, bump and hurry.

Four hundred years after his death, Shakespeare surely lives on, in everyday speech, as the most famous writer of all time!

【1】The main idea of the text is _____.

A. the 400th anniversary of Shakespeare’s death

B. the influence Shakespeare has on English

C. the achievements of William Shakespeare

D. Shakespeare’s colorful and fruitful life

【2】 Shakespeare is honored in the following ways except_________.

A. a great number of free events in Stratford-upon-Avon

B. a series of activities in the London Shakespeare Centre

C. a series of exhibitions in the Folger Shakespeare Library

D. a live show of Shakespeare from Stratford-upon-Avon

【3】According to the next, a simply game to make a difficult conversation easy is called ________.

A. an ice-breaker

B. a suspicious man

C. a critic

D. a laughable man

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