所谓的“精明的捕食者”策略中不包括()A.捕食者大多捕食年老、体弱或年幼的食物个体

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问题:

所谓的“精明的捕食者”策略中不包括()

A.捕食者大多捕食年老、体弱或年幼的食物个体

B.捕食者多数在个体数量较小的种群中捕食

C.捕食者往往在个体数量较大的种群中捕食

D.捕食者一般不会将所有的猎物都吃掉

考点:生物学生物进化论生物进化论题库
题型:单项选择题

从构建和谐社会看民主法治的必要性和重要性。

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John lived with her mother when he was young. He didn’t know who his father was. The woman did some washing for the rich and could buy only some bread for her son. So the boy was short and thin.

One cold morning there was much snow in the streets. A car knocked the woman down and the policemen took her to the hospital. She didn’t tell John that his father deserted(遗弃) her before he was born until she died. She left her son the name and address of his father.

John found his father, Mr. Brown, in another city. He was one of the richest shopkeepers and he had to receive his son. From then on the boy lived a rich life. He ate all kinds of delicious food and wore beautiful clothes. But he didn’t go to school and could not read or write.

Once his father took him to a party. He saw a newspaper lying on the floor and picked it up while others were talking about a film. He had a look at it and found a car’s wheels(轮子) were upward(向上).He called out,“ Oh, dear! An accident happened!”

All the people were surprised and began to read the newspaper. But soon they all began to laugh. Do you know why?

小题1:John didn’t know his father because       .

A.the man was rich

B.the man deserted his mother

C.his mother left the man

D.the man didn’t like him小题2:John was short and thin because      .

A.he didn’t like sports

B.his parents were short, too

C.he was often hungry when he was young

D.his mother never gave him food小题3:The woman told John who his father was       .

A.after she was knocked down by a car

B.before her son left

C.before she was in hospital

D.before she died小题4:After John found his father,      .

A.he was angry with the man

B.he started a rich life

C.he wouldn’t live with him

D.the man was bad to him小题5:The people at the party laughed at him because        .

A.he held the newspaper upside down

B.he wasn’t polite

C.the newspaper was yesterday’s

D.he wasn’t clever

题型:单项选择题

设a为实数,函数f(x)=x3+ax2+(a-2)x的导数是f′(x),且f′(x)是偶函数,则曲线y=f(x)在原点处的切线方程为(  )

A.y=-2x

B.y=3x

C.y=-3x

D.y=4x

题型:单项选择题

2008年曾发生过“1.25冰冻灾害”、“4.13拉萨事件”、“5.12汶川大地震”,而这些事件发生的时间加起来都是“8”。据此,有人认为2008年不吉利。在你看来,这一观点                                        (   )

A.违背了联系的客观性

B.表明了一事物总是与其他事物联系着

C.否定了意识对物质有能动作用

D.说明了事物之间的联系是具体的

题型:单项选择题
如图所示,理想变压器原副线圈匝数之比为4:1,原线圈接入一电压为u=220sin100πtV的交流电源,副线圈接一个R=27.5Ω的负载电阻.则下述结论正确的是(  )

A.副线圈中电压表的读数为55V

B.副线圈中输出交流电的周期为0.01s

C.原线圈中电流表的读数为0.5A

D.原线圈中的输入功率为110W

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