题干

非洲某草原生态系统有如图所示的食物网,请据图回答:

(1)这个食物网包括____ 条食物链.

(2)图中属于第三营养级的生物有____,狮子和野狗的关系是____ 

(3)该生态系统除包括图示各成分外,还包括________ .流入该草原生态系统的总能量为____.生态系统输出的能量形式是____

(4)这块草原的生产者固定太阳能为300万千焦/年.按10%能量传递效率计算,设一种生物被下一个营养级各种生物平均摄食,则狮群获得的能量正好维持其种群的生存,此时狮群获得的能量是____ 万千焦/年.

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5,\u86c7\u3001\u91ce\u72d7\u548c\u72ee\u5b50,\u6355\u98df\u548c\u7ade\u4e89,\u975e\u751f\u7269\u7684\u7269\u8d28\u548c\u80fd\u91cf,\u5206\u89e3\u8005,\u751f\u4ea7\u8005\uff08\u8349\uff09\u6240\u56fa\u5b9a\u7684\u592a\u9633\u80fd,\u70ed\u80fd

同类题3

任务型阅读

    In the digital age, copying someone else's words is easy, but getting caught copying is even easier. When Melania Trump recently spoke at the Republican convention, she used some of the same words that Michelle Obama had used at the Democratic convention in 2008. Within hours, news spread around the world with the claim that Melania Trump had plagiarized Michelle Obama's speech. Students and teachers at universities in the U. S. and elsewhere were shocked.____

    What is plagiarism?

    ____That person could also be called a "literary thief' or a" plagiarist'.

    Why is plagiarism a serious problem?

    It's our own worst fear, to have that thing that we created stolen from us, and it's the same as our words. That thing that we created is essential to who we are.____Academics are especially aware of the nature of plagiarism because their work is essentially the creation of ideas and putting them into words.

    ____

    One of the possible punishments for' plagiarism at U. S. universities is dismissal from the school. Students may fail a course or be given a letter of censure(谴责)that stays on their school record, Professors or researchers who plagiarize may damage or end their careers.

    Plagiarism is easy to find

    Before the digital age we live in, plagiarizing was harder. You had to write out the words you copied. But now anything can be copied and pasted. In the past, teachers would have to work hard to prove that work was copied.____The plagiarism checking software programs used by many students and universities include Turnitin, Grammarly, Duplichecker, and Ithenticate. Nobody is going to get away with it.

A. How to avoid plagiarism

B. Consequences of plagiarism

C. Stealing our words is as serious as if stealing our child.

D. Nowadays, some software programs will help you avoid plagiarism

E. Plagiarism is to copy someone else's written work without giving them credit.

F. But nowadays, all you have to do is run a paper through a plagiarism detection software.

G. They learn from their early years in school that copying another writers words is wrong.