题干

俗话说“人往高处走,水往低处流”,而植物体却能把根吸收的水分运达数米高的顶部.水分向上运输的动力主要来自植物的(  )


A:光合作用

B:呼吸作用

C:蒸腾作用

D:吸收作用

上一题 下一题 0.0难度 选择题 更新时间:2018-08-12 12:31:59

答案(点此获取答案解析)

C

同类题1

材料概括分析题。

    上海滩上还滋生着“洋场恶少”。鲁迅说他们虽是文人,但在文学论争中从不说出“坚实的理由”,“只有无端的诬赖,自己的猜测,撒娇,装傻”,这就颇有些流氓气了。鲁迅曾这宿刻画上海滩上的流氓:“和尚喝酒他来打,男女通奸他来捉,私娼私贩他来凌辱,为的是维持风化;乡下人不懂租界章程他来欺侮,为的是看不起无知;剪发女人他来嘲骂,社会改革者他来憎恶,为的是宝爱秩序。但后面是传统的靠山,对手又都非浩荡的强敌,他就在其间横行过去。”可见上海流氓也是既以传统为靠山,又以洋人的“章程”为依托的,而其最基本的职责就是维护现存的“秩序”。所以鲁迅说:“殖民政策是一定保护,养育流氓的。”这宿,“流氓文化”也就必然构成20世纪30年代上海现代都市文明的一个有机组成部分。鲁迅说其特点是将“中国法”与“外国法”集于一身,可以说它是西方文化与中国传统文化中最恶俗的部分的一个恶性嫁接。鲁迅说:“无论古今,凡是没有一定的理论,或主张的变化 并无线索可寻。而随时拿了各种各派的理论来作武器的人,都可以称之为流氓。”……而流氓文化的最大特点也就是无理论、无信仰、无文化,“无所谓法不法,只要被他敲去了几个钱就算完事”。所以,流氓文化的“横行”本身就标示着社会的腐败、无序与混乱,这其实是一种“末路现象”,如鲁迅所说:“这些原是上海 滩上久已沉沉浮浮的流尸,本来散见于各处的,但经风浪一吹,就漂集一处,形成一个堆积,又因为各个本身的腐烂,就发出较深厚的恶臭来了”。也还是鲁迅说得好:这样的“流尸文学将与流氓政治同在”。

同类题4

任务型阅读

    Small talk is the short conversations we have at parties, while we wait in line at the store, at family events or work. Sometimes we make small talk with people we already know but not well. Often we have to make small talk with complete strangers.____ Here are some tips to improve your small-talking ability.

    ⒈____

    If you have seen a really good movie or have read a really good book, you can talk about that.

    When you are sharing the same experience with someone, it's easy to start a conversation. You simply notice and comment on what's going on around you. For example, if you are at a party and a song comes on that you like or that reminds you of something, you can talk about that.

    ⒉Ask open-ended questions

    These types of questions require more thought and more than a simple one-word answer.____ the conversation will go on longer.

    ⒊Become a student

    Nobody knows everything. So,as someone is answering one of your open-ended questions, they bring up something about which you know nothing. So, tell them! This lets the other person become the teacher.____ It's a win-win situation.

    Like anything, getting good at making small talk takes practice.____you might become happier. If you are making small talk using English, you will most definitely improve your speaking and listening skills.

A. Have some conversation starters ready

B. If you make small talk in your native language

C. However, some people are not good at small talk

D. If you ask questions that need more details to answer

E. You can talk about something that you recently learned

F. Many people find these small conversations about random topics easy

G. They feel good about sharing their knowledge and you get to learn something