问题 解答题

这是一位同学写的一份关于探究“光对鼠妇生活的影响”的实验报告,由于被水浸渍,一些地方字迹已经看不清楚(题目中画横线处),请你将它补充完整,并回答他所提出的问题.

实验报告

实验内容:光对鼠妇生活的影响

问题:______.

假设:______.

设计方案:

(1)材料用具:20只鼠妇,湿润的土壤,纸盒一个,纸板、玻璃板各一块.

(2)实验装置:在纸盒里放上一层湿润的土壤,以横轴中线为界,一侧盖上玻璃板,一侧盖上纸板.这样,在盒里就形成了______和______两种环境.

方法步骤:

(1)将鼠妇放入纸盒中,两侧的中央放入数量相等的鼠妇,静置2分钟.

(2)每分钟统计一次明亮处和黑暗处的鼠妇数目,统计10次.

实验记录:

不同时间,不同环境下的鼠妇数目

环境2min3min4min5min6min7min8min9min10min11min
明亮3222232212
黑暗17181818181718181918
结论:______对鼠妇的生活有影响,鼠妇喜欢在______的环境中生活.

问:为什么实验结束后要洗手?______.

这个实验的变量是什么?______.

答案

问题:由于探究的是光对鼠妇的影响,所以提出的问题是光对鼠妇的生活有影响吗?(意思对即可)

假设:作出的假设可以有两种,一种是光对鼠妇的生活有影响,另一种是光对鼠妇的生活没有影响.(意思对即可)

结论:根据实验结果可以看出,在不同的时间不同的环境下,明亮环境中平均鼠妇约为2个,黑暗环境平均为18个,可以得出实验结论:光对鼠妇的生活有影响,鼠妇喜欢生活在黑暗的环境中.

实验结束后要洗手?因为在实验中接触到土壤及鼠妇,这样的环境里会滋生着大量的病菌等微生物,所以实验结束后要洗手,目的是清除手上沾染的病菌等微生物.

这个实验的由于探究的是光照对鼠妇的生活的影响,所以设计的对照实验组应该是以光照为惟一变量,即有光和无光.

故答案为:(1)、问题:光对鼠妇生活有影响吗?(答案合理给分)

(2)、假设:鼠妇喜欢(或不喜欢)黑暗的环境.(答案合理给分)

(3)、有光、无光

(4)、光、黑暗

(5)、防止微生物或病菌对人体危害.(答案合理给分)

(6)、有无光照

单项选择题
阅读理解

Being able to call on the old boy's network helps you get your foot in the door,but has little impact on your later success.Having good connections does change your possibility of being offered a higher wage when you start working,but has no impact on your eventual wage.Coming from a wealthy background has little impact on lifetime earnings.Over time,brain power soon overtakes(超过),and intelligence is the factor,which will determine your earnings and success.The speed of your rise through the ranks is determined largely by your own intelligence.

The study monitored earnings and promotions over the course of 25 years.Scores were used to assess the Socio­Economic Background(SEB)-wealth and connections-and standard Army intelligence tests used to assess intelligence.The study is sure to infuriate(激怒)those angered by wealthy groups such as Oxford's upper-crust(上流社会)Bullingdon Club,of which both David Cameron and Borris Johnson were members.

Professor Yoav Ganzach says that these findings have a positive message for those,who can't rely on nepotism(裙带关系)for their first job.“Your family can help you start your career and you do get an advantage,but it doesn't help you progress.And once you start working,you can go wherever your abilities take you,” he says.When intelligence and SEB are pitted directly against once another(相互较量),intelligence is a more accurate predictor of future career success,he say.

小题1:How many factors which may influence one's career are mentioned in the passage?

A.1.

B.2.

C.3.

D.4.小题2:Who will be encouraged most after reading the passage?

A.People who are lack of money.

B.People who can't depend on nepotism.

C.People with high intelligence.

D.People with wide connections.小题3:What's the main idea of the passage?

A.Earnings and promotions are up to your own.

B.A study conducted by Professor Yoav Ganzach.

C.SEB is very important in one's first career.

D.Success is determined by your own brain power.