试述捕食对种群的调节作用。

题型:问答题

问题:

试述捕食对种群的调节作用。

考点:普通考研07理学生态学
题型:问答题

阅读理解。

     The idea of what shaking the head means is not always the same in different countries.

Maybe some visitors would be surprised when they first came to India.When they talked to an Indian, he would often shake his head.The visitors might think.that the Indian did not like what they said.But, in fact,

they would be completely wrong.

     Indians always shake their heads when they talk to others.It does not have the same meaning as our "

No", if someone wants to visit India, he should know this, or it will give him some trouble.

One day, a foreign officer went to India on business.He hired (雇用) a car and an Indian to drive it. When he told his driver to send him to his office, the Indian shook his head at once.The officer said again, and

the driver shook his head again.At last, of course, the officer got angry.

     "What do you mean?" he shouted, "Drive me to my office at once!"

     The driver answered in quite a loud voice, too. "Yes,sirl" But to the officer's surprise, the driver shook

his head at the same time.

     The car started, and the foreign officer was now too surprised to say a word.He thought about it for a while,and then nodded with a smile,is s No' means 6Yes' here! "

根据短文内容,每空只填写一个单词。

      An Indian will 1.             his head when he agrees with others.  The foreign officer was 2.             that

the driver shook his head as he said "Yes".  When they see an Indian shaking his head, visitors may think

the Indian doesn't 3.           what they are saying.  From the first sentence of the passage we know shaking the head means "Yes" in 4.             countries.  We can see at the end of the passage that the officer was

not 5.            with the driver any more.

题型:问答题

2位男生和3位女生共5位同学站成一排.若男生甲不站两端,3位女生中有且只有两位女生相邻,则不同排法的种数为 (  )

A.36

B.42

C.48

D.60

题型:问答题

闭合性肋骨骨折时,下列哪项最能说明肺或支气管有损伤()

A.伤侧肺呼吸音减低

B.伤侧肺有啰音

C.伤侧胸内剧痛

D.伤侧皮下气肿

E.伤侧胸腔积液

题型:问答题

商业银行经营的“三性原则”是具有完全内在统一性的整体。()

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《黄帝内经》、《伤寒杂病论》等经典著作中所记载的方剂称()

A.经方

B.时方

C.秘方

D.单方

E.验方(偏方)

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