在下图中,甲表示1940~1960年某地降雪天数,乙表示在同一时间内该地区白鼠占同种

题型:填空题

问题:

在下图中,甲表示1940~1960年某地降雪天数,乙表示在同一时间内该地区白鼠占同种个体的百分数,请分析回答:


生活在雪地里的老鼠的毛色为白色,这是生物对环境的______现象,如果降雪推迟,白色鼠易被天敌发现而遭捕食,这说明______。

考点:普通考研07理学生态学
题型:填空题

电泵采油工应了解电泵井哪些情况?

题型:填空题

Listening to music can help me focus better. Since I discovered it two years ago,I've used music to get through boring work or to focus creatively. I've found that it can make even the dullest jobs enjoyable and help clear mental blocks to creativity.

I first noticed the good effects of music while playing video games. It was a few days before Christmas in 2005 and I was playing online video games. My parents had just given me a new MP3,so I decided to listen to music through the headphones while I played. After a few minutes I noticed a great change in my style of play. I was playing more naturally. The music relaxed me,and,to a certain extent,distracted me from the game,allowing my subconscious(潜意识的)talent to come through. The music also helped me block out the outside world. With those headphones on I was like a machine,moving from one task to the next without unnecessary thoughts or actions.  

Music can also have a great effect on mood. If I'm in a bad mood at work,I'll listen to some of Bob Marley's and get down to business. It always takes my mind off what I'm doing and makes me a happier person. The same is true for classic rock. One summer,I did a boring job collecting bottle openers by hand. Without a radio playing classic rock in the background,I would have hated life.

Listening to music with relaxing rhythms and a positive message helps you forget your work and think happy thoughts. But the results you see will depend heavily on your personal tastes. Experiment with the types of music you listen to during certain tasks. By trial and error you'll finally discover your best choice.

I'm always looking for new concentration aids,so I'd love to know what type of music works best for me.

小题1:We can infer that the passage was written in ________.

A.2005  

B.2006  

C.2007  

D.2008小题2:The author first discovered the effects of music ________.

A.from his parents

B.by chance

C.at work

D.when he was a child小题3:The author mentions the experience of collecting bottle openers in Paragraph 3 to ________.

A.tell us that life is dull

B.prove that music affects mood

C.tell us how to seek happiness

D.tell us bad mood can affect work

题型:填空题

短信通知服务是否自动开通()。

A.是

B.不是

C.不一定,金卡持卡人自动开通

D.不一定,单币贷记卡持卡人自动开通

题型:填空题

简述主要的大气污染物。

题型:填空题

收入弹性是指( )。

A.居民收入变动百分比所导致的产品需求变动百分比
B.居民收入变动百分比所导致的产品供给变动百分比
C.产品需求变动百分比所导致的居民收入变动百分比
D.产品供给变动百分比所导致的居民收入变动百分比、

更多题库