在图所示的电路中. 先闭合开关S1,当再闭合开关S2时,关于灯泡L1的亮度及电流

题型:选择题

问题:

在图所示的电路中. 先闭合开关S1,当再闭合开关S2时,关于灯泡L1的亮度及电流表示数变化的情况是

A.L1亮度不变,电流表示数变大

B.L1亮度不变,电流表示数不变

C.L1变暗,电流表示数不变

D.L1变暗,电流表示数变小

考点:欧姆定律及其应用
题型:选择题
Do you write your own blog(博客)?Do you often       others' blogs on the Internet?
All over the world, not only famous persons but also many students use blogs as diaries and places to share their experience and        advice or help.
“I write my activities every day,       funny things or worries in my life.” says Lali, a 16-year-old high school student at Cambridge High School in Washington." I like putting pictures on my blog because it can make my blog more      and more people will like it, It's a good way to        my life to the world." She has had her blog for eight months.
Students like writing blogs     they can write anything they want to, but don't need to       any money.
Once(一旦)you start to write your blog, you will        that you open up a new world. But what you write down may trouble you      . So, use the blog carefully       you can keep yourself away from some trouble. The blog makes everybody's life colorful.
小题1:
A.readB.writeC.forgetD.miss
小题2:
A.learn fromB.deal withC.ask forD.depend on
小题3:
A.withoutB.betweenC.includingD.besides
小题4:
A.commonB.modernC.famousD.interesting
小题5:
A.showB.sendC.bringD.report
小题6:
A.unlessB.whileC.untilD.because
小题7:
A.saveB.spendC.takeD.waste
小题8:
A.dreamB.thinkC.findD.hope
小题9:
A.sometimesB.alwaysC.everD.never
小题10:
A.only whenB.even thoughC.so thatD.ever since
题型:选择题

R1、R2两只电阻的阻值之比为2:3,若把它们串联后接入电路,R1、R2两端电压之比是________,电功率之比是________;若将它们并联后接入电路,通过R1、R2的电流之比是________,电功率之比是________.

题型:选择题

访谈法

题型:选择题

如图所示,将完全相同的两小球A、B用长L=0.8m的细绳,悬于以向右匀速运动的小车顶部,两球与小车前后壁接触。由于某种原因,小车突然停止,此时悬线中张力之比

A.1:1

B.1:2

C.1:3

D.1:4

题型:选择题

关于资产负债率评价,下列选项中表述最严谨的是()。

A.对股东而言,负债比率越高越好

B.对股东而言,当全部资本利润率高于利率时,负债比率越高越好

C.对债权人而言,债务人负债比率越高越好

D. 对债权人而言,债务人负债比率越低越好

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