探究一种条件对研究对象的影响时,所进行的某种条件不同以外,其他条件都相同的实验,

题型:读图填空题

问题:

探究一种条件对研究对象的影响时,所进行的某种条件不同以外,其他条件都相同的实验,叫做          

考点:调查身边的生物
题型:读图填空题

March 24th

This morning, we had a school trip to the Dashan Collection House, a building of two floors. It is open from 9:00 am to 5:00 pm. We took the school bus and arrived at 9:00. When we entered the collection house, our eyes were caught by a collection of old photos of the town on the walls of the front hall. Those photos told us something about the history of the town. And then in the Art Room, we saw many pictures of the countryside. The colors of the flowers and trees are rich and bright. All at once, I lost myself in the beauty of nature.

Then we went upstairs. On the left, there were over one hundred different clocks. The oldest clock was already more than two hundred years old. To my surprise, the clocks all worked well and they could tell the right time. It was then ten o’clock, and some clocks produced different beautiful sounds. It seemed to be a concert. How amazing!

On the right there was also a stone collection. The stones were from all over the country. They were in different sizes, colors and shapes. Some looked like different kinds of animals. I really liked one stone that looked like a little monkey. It looked very nice.

The collections there were wonderful. So they stayed there until 11:30 in the morning. I had a great time and really liked the school trip.

1. On which day did the writer have a school trip?

On                       .

2. Where did the writer go for the school trip?

The writer went to                                                

3. What did the writer see in the Art Room?

The writer saw                                                    .

4.How many kinds of collections are mentioned in the passage?

There are         kinds.

5. How long did they stay there?

For                                   .

题型:读图填空题

下列实验基本操作正确的是(  )

A.

读取液体体积

B.

检查装置气密性

C.

向试管中倾倒液体

D.

给盛有液体的试管加热

题型:读图填空题

请利用如下材料,设计一个生物与环境关系的模拟实验,并做出分析。

实验材料:4m2的红、绿、白3种颜色的纸板各1块。数量相等,活力相近的绿蝗虫3组(每组约50只),家鸡3组(每组3只)。

(1)实验方案:_____________________________________。

(2)预期结果:_____________________________________。

(3)结果分析:蝗虫的身体呈绿色是一种            ;②蝗虫绿色体的形成是              .

题型:读图填空题

擅自跨省、自治区、直辖市从事烟草制品批发业务的行政法律责任是什么?

题型:读图填空题

低温球阀长时间在小开度下工作,流速过大,容易造成()损坏而内漏。

A、球芯

B、填料密封

C、阀内件

D、端盖密封

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