如图所示,已知R1=6Ω,U:U2=4:1,则R2的阻值是______Ω,U1:

题型:填空题

问题:

如图所示,已知R1=6Ω,U:U2=4:1,则R2的阻值是______Ω,U1:U2=______.

考点:电阻的串联串联电路的电压规律
题型:填空题

会计电算化岗位及其权限设置一般是在()时完成,平时可以根据人员的变动进行调整。

A.填制凭证

B.系统初始化

C.审核凭证

D.输出报表

题型:填空题

CYJ—3—37HB中的“3”表示的是()是3米。

题型:填空题

根据对话内容,在每个空白上一个适当的句子,使对话意思完整、正确。

A: Lovely day, isn't it?

B: Oh, yes, beautiful.

A: 1__________________________________________?

B: No, I'm from Spain, I'm learning English here.

A: 2___________________________________________?

B: For three years now.

A: For three years? Goodness me! 3__________________________________________.

B: Thank you. And there's still a lot for me to learn.

A: 4____________________________________________

B: Another two months. Then I'll have to go back to Spain to start work.

A: A cousin of mine went to Spain last year. He's an engineer.

B: Really? 5___________________________________?

A: He must like it very much, because he hasn't come back yet. I hope you enjoy your staying in England.

B: Thank you. I'm sure. I will.

题型:填空题

18世纪70年代,英国城乡人口比例为1:2,19世纪初上升为2:3,最主要的原因是:

A.圈地运动使农民流入城市 

B.大量吸收外来移民

C.大量人口迁入殖民地

D.工业革命改变了人口布局

题型:填空题

完璧归赵:蔺相如

A.勾践:卧薪尝胆

B.身在曹营:周瑜

C.高枕无忧:孙权

D.呆若木鸡:秦王

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