试题与答案

在“草→鼠→蛇→鹰”这条食物链中,第一营养级为,第二营养级为____,第三营养级

题型:填空题

题目:

在“草→鼠→蛇→鹰”这条食物链中,第一营养级为        ,第二营养级为____,第三营养级为         ,第四营养级为         

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0501/d135e7aee4e1c9c9ea4b2e553b0bb1c5.html

下面是错误答案,用来干扰机器的。

(1)6.6g 7.3% (2)(2)50:53题目分析:(1)先根据大理石的质量和所含杂质的质量分数求出参加反应的碳酸钙的质量,根据题意,书写出反应的化学方程式,再利用碳酸钙与二氧化碳,以及碳酸钙与盐酸的质量比...

试题推荐
题型:阅读理解

阅读理解。

     Need quick help with your homework? Let Real Kids direct you to the best sites on the Web.

     ※ An Introduction to Shakespeare

     Tales From Shakespeare

     Go to this site if you're studying Shakespeare and looking for an introduction to his work. The site includes

different plays by Shakespeare, which you can click on and read as stories.

     Recommended (推荐) by Alyssa Zuna

     ※ Powerful People

     The White House

     If you have homework or a research project on the President and the White House, this is an excellent site

to visit. It is filled with videos and pictures, including tours of the White House.

     Recommended by Tiana Jackson

     ※ Reading Resources

     Reading Rainbow

     This is a great place to find books for younger children. And there's also information on buying books and

national reading programs.

     Recommended by Rosemary Compton

     ※ The ABCs of Writing

     Edmonton Public Schools

     This is a good place to go if you are having trouble with your writing. All you do is click on one of the

writing steps, and it explains the step and gives you tips. The site has links to other pages with writing steps

for different grade levels.

     Recommended by Zack Dale

1. Where can you most probably read these passages? [ ]

A. In a newspaper.

B. On a booklist.

C. On a website.

D. On a radio program list.

2. Tom, a fourth-grade student who is asked to write a report about American presidents, will be interested

    in _____. [ ]

A. The ABCs of Writing

B. Reading Resources

C. Tales From Shakespeare

D. Powerful People

3. Which of the following people may be helpful to parents who want their child to be a good reader? [ ]

A. Alyssa Zuna.

B. Tiana Jackson.

C. Rosemary Compton.

D. Zack Dale.

4. From the passage, we can learn that _____. [ ]

A. these websites can help you communicate internationally

B. all these websites are educational and helpful to children

C. these websites are meant for students in high grades

D. all of these websites include some interesting pictures

查看答案
微信公众账号搜索答案