下列措施中能提高生态系统的自我调节能力的是 A.减少生物的种类 B.减少生产者

题型:选择题

问题:

下列措施中能提高生态系统的自我调节能力的是

A.减少生物的种类  

B.减少生产者的数量

C.增加生物的种类  

D.增加消费者的数量

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:选择题
I learned how to accept life as it is from my father.     . he did not teach me acceptance when he was strong and healthy, but rather when he was     and ill .
My father was     a strong man who loved being active. But a terrible illness     all that away. Now he can no longer walk. And he must sit quietly in a chair all day. Even talking is     . One night, I went to visit him with my sisters. I told them about one of my beliefs. I said that we must very often give things up      we grow our youth, our beauty, our friends, but it always     that after we give something up,we gain something new in its place. Then suddenly my father spoke up, “But, Peter, I gave up     !What did I gain?” I thought and thought, but I could not think of anything to say.        he answered his own question: “I     the love of my family.” I looked at my sisters and saw tears in their eyes along with hope and thankfulness.
I was also     by his words. After that, when I began to feel irritated (恼怒的) at someone, I would remember his words and become     . If he could replace his great pain with a feeling of love for others, then I should be     to give up my small irritations. In this     ,I learned the power of acceptance from my father.
Sometimes I      what other things I could have learned from him if I had listened more carefully when I was a boy. For now, though I am grateful for this one gift.
小题1:
A.CertainlyB.ThereforeC.HoweverD.Meanwhile
小题2:
A.tiredB.weakC.poorD.slow
小题3:
A.alreadyB.stillC.onlyD.once
小题4:
A.tookB.threwC.sentD.put
小题5:
A.stressfulB.difficultC.impossibleD.hopeless
小题6:
A.asB.sinceC.beforeD.till
小题7:
A.suggestsB.promisesC.seemsD.requires
小题8:
A.somethingB.anythingC.nothingD.everything
小题9:
A.surprisinglyB.immediatelyC.naturallyD.certainly
小题10:
A.hadB.acceptedC.gainedD.enjoyed
小题11:
A.touchedB.astonishedC.attractedD.warned
小题12:
A.quietB.calmC.relaxedD.happy
小题13:
A.readyB.likelyC.freeD.able
小题14:
A.caseB.formC.methodD.way
小题15:
A.doubtB.wonderC.knowD.guess
题型:选择题

We know that 80          of the cases of blindness can          .

A.per cents; cure

B.percent; cured

C.per cent; be cured

D.percent; are cured

题型:选择题

关于下图中山脉两侧地形区的说法正确的是[ ]

A.①的南侧是青藏高原

B.②的东侧是华北平原

C.③的南侧是云贵高原

D.④的北侧是四川盆地

题型:选择题

下列函数在x=0处可导的是()。

A.y=|x|

B.y=x2

C.

D.

题型:选择题

软件需求分析的任务不应包括结构化程序设计。进行需求分析可使用多种工具,但 (20) 是不适用的。在需求分析中,分析员要从用户那里解决的最重要的问题是 (21) 。需求规格说明书的内容不应当包括 (22) 。该文档在软件开发中具有重要的作用,但其作用不应当包括 (23)

(20)处填()。

A.数据流图

B.判定表

C.PAD图

D.数据词典

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