進入____________

練習冊系列答案
相關(guān)習題

科目:初中英語 來源: 題型:閱讀理解

What’s a blog? A blog is a personal online diary(日記). It’s cool, it’s hot, and everyone is doing it. People talk about it often. Sound like a fashion? In fact, It’s another trend (流行趨勢). And the word “blogger” means a person who writes diaries online. Are you a blogger?  
Many bloggers are teenagers who log (進入) onto websites to discuss anything in their lives. Many of today’s teenagers are not afraid to openly discuss everything in their lives. Teenagers complain about their parents and homework. They share diaries, post(發(fā)布) songs from the latest bands and show pictures of theirs. They write their own poems, say something about their girlfriends or boyfriends and complain to each other or offer support. But mostly they just write down what they do every day.  
However, many parents are worried about these young bloggers. Parents see the kids talking about how they got drunk last weekend and how they don’t like studying. They are using the language that is surprising to their parents. Besides hearing from their friends, teen bloggers also get messages from strangers. Most of the time, it’s older men asking to meet teenage girls. “These strange men are dangerous for my kids. They sometimes teach my kids bad words.” said Cara Cabral, a mother of two children.  
Many teenagers and young adults know it’s not safe to use blogs on the Internet. They know they are putting information about themselves in a place where it can be seen by anyone. But teenagers are unwilling to give up these new communication tools that have become a way of life for many of them.   
【小題1】 The underlined word “it” in the first paragraph means ________.  
A. the fashion          B. the Internet       C. the blog      
【小題2】 Which of the following is NOT TRUE?  
A. Teenagers don’t tell about their personal life in their blogs.  
B. Teenagers mostly write down what they do every day in their blogs.  
C. Teenagers complain about their parents and homework in their blogs.  
【小題3】 What’s the main idea of the third paragraph?  
A. Many parents don’t understand kids’ language in their blogs.  
B. Many parents are worried about these young bloggers.   
C. Many parents can understand why their kids don’t like studying.  
【小題4】 Many parents think it’s         for their children to get messages from strangers.  
A. dangerous     B. interesting        C. surprising   
【小題5】 We can learn from the last paragraph that         .  
A. It’s easy for many teenagers to give up blogging on the Internet                   
B. It’s safe for many teenagers to put their personal information on the Internet  
C. It’s popular for many teenagers to use blogs on the Internet 

查看答案和解析>>

科目:初中英語 來源: 題型:閱讀理解

(10分)生長素的主要作用是促進細胞縱向伸長,其作用機理如圖所示,請回答下列問題:

(1)生長素作用的第一步是與細胞膜上的受體結(jié)合,形成“激素—受體復合物”,這一過程體現(xiàn)了細胞膜的_________功能。
(2)被激活的“激素—受體復合物”能引起內(nèi)質(zhì)網(wǎng)釋放Ca2 + , Ca2 +促使細胞內(nèi)的 H+        的方式運往細胞外,增加了細胞壁的延展性,使細胞壁對細胞的壓力減小,導致細胞吸水、體積增大而發(fā)生不可逆增長。細胞在生長過程中體積變化最大的細胞器是________。實驗發(fā)現(xiàn),細胞在持續(xù)生長過程中,細胞壁的厚度能基本保持不變,出現(xiàn)這種現(xiàn)象的原因是由于_____________(填細胞器)為細胞壁添加了新的成分。
(3) Ca2 +還能激活細胞中的轉(zhuǎn)錄因子,它進入細胞核后,能引起____酶催化 mRNA 的合成。
(4)生長素促進根系生長的最適宜濃度要比莖低得多,稍高濃度的生長素能促進乙烯的生物合成,從而抑制了根的伸長,這說明生長素的作用具有__________。
(5)科學家研究發(fā)現(xiàn)紫外線可以抑制植物生長,原因是紫外線增加了植物體內(nèi)吲哚乙酸氧化酶的活性,從而促進了生長素氧化為3—亞甲基氧代吲哚,而后者沒有促進細胞伸長的作用。現(xiàn)在提供生長狀況相同的健康的小麥幼苗若干作為實驗材料,請完成下列實驗方案,以驗證紫外線抑制植物生長與生長素的氧化有關(guān)。
步驟 1 :將小麥幼苗平均分為甲組和乙組。
步驟 2 :給予甲組適宜的可見光光照,給予乙組_______________________光照。
步驟 3 :觀察兩組幼苗的________________,并測量___________的含量。
預測實驗結(jié)果: ______________________________________________________。

查看答案和解析>>

科目:初中英語 來源: 題型:

(6分)據(jù)圖回答下列問題:

(1)據(jù)圖1,若某植物幼苗已表現(xiàn)出向光性,且測得其向光面的生長素濃度為m,則背光面生長素濃度范圍是             。
(2)據(jù)圖1可知,除草劑滅草的原理是使雜草的生長素濃度大于       (填圖1中字母)。
(3)在探究生長素促進插條生根的最適濃度時,一名技術(shù)人員用幾種不同濃度生長素溶液處理插條基部,然后在沙床中培養(yǎng),觀察生根情況。圖2為生長素促進枝條生根的情況。請結(jié)合圖1判斷,在下列各項濃度值中,最好選用(   )
A.3mg·mL-1B.6 mg·mL-1C.9 mg·mL-1D.4.5 mg·mL-1
(4)生長素的主要作用是促進細胞縱向伸長,其作用機理如圖3所示,請回答下列問題:

①生長素作用的第一步是與細胞膜上的受體結(jié)合,形成“激素—受體復合物”,這一過程體現(xiàn)了細胞膜的              功能。
②實驗發(fā)現(xiàn),細胞在持續(xù)生長過程中,細胞壁將發(fā)生一定變化,出現(xiàn)這種現(xiàn)象的原因是由于              (填細胞器)為細胞壁添加了新的成分。
③此外,Ca2+ 還能激活細胞中的轉(zhuǎn)錄因子,它進入細胞核后,能引起         酶催化mRNA的合成。

查看答案和解析>>

科目:初中英語 來源:2015屆江蘇興化安豐中學七年級下學期第二次月考英語卷(解析版) 題型:書面表達

根據(jù)下面的提示寫一篇70字左右的作文

1. 昨晚,Simon做了一個夢

2. 在夢中他追趕一只兔子來到一扇門前。

3. 兔子輕松穿過這道門,Simon個子太大無法進入

4. 他喝下門旁邊的一瓶水,瓶子上面有一個標簽“請喝我”。

5. 喝水之后,他變得越來越小。

6. 他穿過這道門進入一個美麗的花園,在那兒玩的很開心

                                                                                  

                                                                                  

                                                                                  

                                                                                  

                                                                                  

                                                                                  

                                                                                  

                                                                         

 

查看答案和解析>>

同步練習冊答案