问题 填空题

图1、图2的实验结果还表明,通电的时间越长,瓶中煤油的温度升得越高,这表明,电流做功还跟______有关系.

答案

图中是影响电流做功多少因素的研究实验.

图1两电阻串联,电路中的电流和通电时间相等,研究了电流做功与电压的关系.

图2两电阻并联,两端的电压相等,通过的电流不同,研究了电功与电流的关系.

通电时间越长,产生的热量越多,说明电功越多,说明了电功的多少与通电时间有关.

故答案为:时间.

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Parents are not only looking for a unique name for their baby, but they also want a name that has a special meaning. American Indians usually have pretty interesting names. These names are given to them through various methods and usually by an elder. American Indians feel very strongly abouL naming their child, and it is almost treated like a ritual. In some American Indian cultures. they even hold a ceremony when they are to name a child

Amcrican Indian children are usually named by an elder who could be eheir grandmother, grandfather. mother or father. The name given by the elder comes to them in many different forms such as charactcnstics of the person, dreams that the elder may have. or the name of a family member who has died It is also true that some Amerlcan Indians arc named after some sort of animal while others are named after nature Some tribes (部落) name their children after events that happen before thiir birth.

Also in different tribes. two of the American Indians in the same tribe can't share the same name Once the person with the name has died. then the name may be used again. It is said that Amcrican Indians believe that they shoutd not address the baby by the name that they are given because if the name is too well-known. the child or baby may be called back to the spirit world; this is what causes many American Indians to be given nicknames(绰号). Many Amcrican Indians arc more commonly known by their nicknames instead of their names given at birth

小题1:What does the underlined word "ritual" in Paragraph l probably mean?

A.exciting moment

B.special event

C.good opportunity

D.great time小题2:Which is not the way Indians name their child?

A.The name of a certain animal.

B.Onc of the child's ancestors.

C.The dreaius of the Indian child.

D.An event before the child's birth.小题3:Why are American Indians given nicknames?

A.It is not convenient to use their formal names

B.They don't want to be famous in the tribes.

C.Parents are afraid cheir child would die young.

D.Nicknames are shortcr and easier to address.小题4:What doCS the text mainly talk about?

A.Ongins of American Indians' names

B.Hisrory of American Indians' names

C.Importance of American Indians' names.

D.Customs in American Indians' names.