家用电灭蚊器的发热部分使用了PTC发热材料,它的电阻随温度变化规律如图所示.使用

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问题:

家用电灭蚊器的发热部分使用了PTC发热材料,它的电阻随温度变化规律如图所示.使用时发热体直接连入家庭电路,当发热体的温度为60℃时,则此时电功率为______W;当发热体温度继续上升时,电灭蚊器发热体的电阻会______(选填“增大”、“不变”、“减小”),它的电功率会______(选填“增大”、“不变”、“减小”).如果这只电灭蚊器的平均电功率为5W,平均每天工作10h,这只家用电灭蚊器的发热体每天产生的热量是______焦耳.

考点:电功率的计算焦耳定律的变形公式的应用
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考察地方党政领导班子成员拟任人选,个别谈话和征求意见的范围一般包括()。

A.党委、政府、人大常委会、政协领导成员

B.纪委、人民法院、人民检察院主要领导成员

C.考察对象所在单位领导成员

D.考察对象所在单位有关工作部门或者内设机构和直属单位主要领导成员

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某工程,建设单位委托监理单位实施施工阶段监理。按照施工总承包合同约定,建设单位负责空调设备和部分工程材料的采购,施工总承包单位选择桩基施工和设备安装两家分包单位。在施工过程中,发生如下事件:事件1:在桩基施工时,专业监理工程师发现桩基施工单位与原申报批准的桩基施工分包单位不一致。经核查,施工总承包单位为保证施工进度,擅自增加了一家桩基施工分包单位。事件2:专业监理工程师对使用商品混凝土的现浇结构验收时,发现施工现场混凝土试块的强度不合格,拒绝签字。施工单位认为,建设单位提供的商品混凝土质量存在问题。经法定检测机构对现浇结构的实体进行检测,结果为商品混凝土质量不合格。事件3:空调设备安装前,监理人员发现建设单位与空调设备供货单位签订的合同中包括该设备的安装工作。经了解,由于建设单位认为供货单位具备设备安装资质且能提供更好的服务,所以在直接征得设备安装分包单位书面同意后,与设备供货单位签订了供货和安装合同。事件4:在给水管道验收时,专业监理工程师发现部分管道渗漏。经查,是由于设备安装单位使用的密封材料存在质量缺陷所致。

工作G经监理工程师核准每月实际完成工程量均为400m3。承包单位在清单报价单中的工料单价为50元/m3,其他直接费费率为间接费费率为10%,现场经费率为5%,利润率为5‰计税系统数为3.41%。按合同约定,工作G每月的结算款应为多少?

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购房的敏感点和动机在于:对()要求很高。则其为为休闲度假购买。

A.交通和配套

B.环境和交通

C.环境和经济

D.环境和配套

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甲公司2007年在物资采购中,有关票据方面发生如下情况:
甲公司销售给乙公司一批货物,按合同约定如期交货,乙公司签发了一张金额为30万元的转账支票,交给甲公司。甲公司到银行提示付款时,发现该支票是空头支票。甲公司认为,对乙公司应处以罚款,并有权要求乙公司给予经济赔偿。
甲公司某采购人员持该公司开户银行签发的、注明“现金”字样的银行本票,购置一批物资。由于该采购人员保管不慎,将银行本票丢失。随后,甲公司采取了一系列的措施。

对于乙公司的行为应由( )进行处罚。

A.财政部门

B.甲公司开户银行

C.中国人民银行

D.乙公司开户银行

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Passage Two


Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy ;there’s no need for a lot of scientific terms or expensive lab equipment. You only have to share your children’s curiosity. Firstly,listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me" textbook questions" about schooling, salary and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said, "Now that we’ve finished with your lists, do you have questions of your own about science"
After a long pause ,a boy raised his hand," Have you ever seen a grasshopper(蚱蜢) eat When I try eating leaves like that, I get a stomachache. Why"
This began a set of questions that lasted nearly two hours.
Secondly, give them time to think. Studies over the past 30 years have shown that, after asking a question, adults typically wait only one second or less tor an answer, no time for a child to think. When adults increase their" wait time" to three seconds or more, children give more logical, complete and creative answers.
Thirdly, watch your language. Once you have a child involved in a science discussion, don’t jump in with" That’s right" or" Very good". These words work well when it comes to encouraging good behavior. But in talking about science, quick praise can signal that discussion is over. Instead, keep things going by saying" That’s interesting" or" I’d never thought of it that way- before", or coming up with more questions or ideas.
Never push a child to" Think". It doesn’t make sense, children are always thinking, without your telling them to. What’s more, this can turn a conversation into a performance. The child will try to find the answer you want, in as few words as possible, so that he will be a smaller target for your disagreement.
Lastly, show;don’t tell. Real-life impressions of nature are far more impressive than any lesson children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass, and they’ll understand why you want them to wash before dinner. Rather than saying that water evaporates, set a pot of water to boil and let them watch the water level drop.

In which of the following paragraph (s) does the author tell us what to say to encourage children in a science discussion

A.The second and third.

B.The fourth and fifth.

C.The fifth and sixth.

D.The sevent

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