右图是草原生态系统中的一部分生物,请据图回答。 (1)图中生产者是;消费者是(

题型:读图填空题

问题:

右图是草原生态系统中的一部分生物,请据图回答。

(1)图中生产者是         ;消费者是         (填其中一种);分解者是          

(2)作为一个完整的生态系统,除了上述的生物以外,还需要             

(3)写出一条会影响鹰的数量的食物链                     

考点:生态系统的概念和组成食物链和食物网生态系统的多样性生态系统的自动调节能力生态系统的功能
题型:读图填空题
已知二项式∈x2+
1
2
x
n(n∈N°)
展开式中,前三项的二项式系数和是56,则展开式中的常数项为(  )
A.
45
256
B.
47
256
C.
49
256
D.
51
256
题型:读图填空题

属于交互式控件的是_________。

A.标签控件

B.文本框控件

C.命令按钮控件

D.图像控件

题型:读图填空题

如图所示,质量为m物块A在质量为M斜面B上正在以加速度a加速下滑,已知斜面倾斜角为θ,物块下滑过程中斜面始终静止,则下列说法中正确的是( )

A.地面对斜面的支持力小于(M+m)g

B.地面对斜面的支持力大于(M+m)g

C.地面对斜面的摩擦力方向向左

D.地面对斜面的摩擦力方向向右

题型:读图填空题

Welcome every morning with a smile. Let your first hour set the theme of success and positive action that is certain to echo(回响) through your entire day. Today will never happen again. Don’t waste it with a false start or no start at all. You were not born to fail.

Starting the day right can give good momentum (动力) for the rest of the day. Having a power morning is a key factor for a fruitful day. Here are some tips on getting the most out of the morning.

Wake up early. In theory, there’s no difference in waking up early or late as long as you get the proper amount of sleep. However, there is a psychological advantage when you wake up earlier than the average person and then you’ll have more time to do preparation before engaging in the real world.

Exercise. Good health is always a benefit with exercise, but studies have also shown that morning exercise helps you to sleep better at nights.

Eat breakfast. It’s the most important meal of the day. According to the Mayo Clinic, we should choose three from the following four: fruits and vegetables, grains, dairy, and protein. Did you know that you can actually gain weight when you skip breakfast?

Take a shower. When you shower, do you do it in the morning or at night? I used to shower in the evenings, but I found that morning showers helped me to be more smart.

Prioritize (优先) your To-Do list. Leo coined the acronym(首字母缩略词) MIT to mean “most important tasks.” Our to-do list might be never ending, but put on top of the list a couple of urgent tasks that will define the day to be a successful one.

Check your emails. Only once. Getting a lot of emails can be very distractive(分散精力的). You actually are more productive when you check them only a few times at fixed time of the day. I only do them 2-3 times a day—once in the morning, once at lunch, and one more as it gets toward the end of the day.

45. The purpose for the author to write this passage is to_______________.

A. tell you to get up early every day

B. offer you the best way to start the day

C. give you advice about how to arrange a day

D. advise you to prioritize your to-do list every morning

46. If you don’t have breakfast, you may__________.

A. lose weight.              B. be productive.    

C. put on weight.            D. be more smart.

47. The underlined word “coined” in Paragraph 6 mean__________.

A. invented         B. designed          C. founded        D. defined

48. The author advises you to check your emails only once because__________.

A. the emails are not important

B. reading e-mails is distractive

C. you can only read e-mails at fixed time

D. getting so many emails can distract your attention

题型:读图填空题

对相量测量装置(PMU)交流电流回路过载能力一般要求是()。

A.与远动测量要求一致

B.不低于1.5倍额定容量

C.不低于1.2倍额定容量

D.不超过1倍容量

更多题库