静态功角稳定计算方法有()。A.特征根判别法 B.静态功角稳定实用算法 C.P-Q分

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问题:

静态功角稳定计算方法有()。

A.特征根判别法

B.静态功角稳定实用算法

C.P-Q分解法

D.最优因子法

考点:电力系统调度运行考试电力系统调度运行考试题库
题型:多项选择题

阅读理解。

     Lily and Lucy are twins (双胞胎). They are English girls.  They are students.  They are in Chongqing

 with their parents.  Lily is in Class One, Grade Seven.  Lucy is in Class two,. Grade Seven.  Lily likes

 eggs for breakfast, and she often has lunch at school.  She likes playing ping-pong.

     Lucy likes hamburgers and chicken for lunch.  She usually has no breakfast.  She likes Beijing Opera.

 She often watches it on TV. She plays the piano very well.

1. Lily and Lucy are in Beijing _____ their parents.

2.  Lucy likes _____ and chicken for lunch.

3. _____ usually has no breakfast.

4. Lily likes playing _____ .

5. Lucy plays the _____ very well.

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设NA为阿伏加德罗常数,下列叙述正确的是(    )

A.24 g镁的原子最外层电子数为NA

B.1 L 0.1 mol·L-1乙酸溶液中H+数为0.1NA

C.1 mol甲烷分子所含质子数为10NA

D.标准状况下,22.4 L乙醇的分子数为NA

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如图所示,AB是一质量为m的均匀细直杆,A端靠在光滑的竖直墙壁上,B端置于水平地面上,杆身与竖直方向夹角为θ,杆与地面的摩擦系数为μ,保持平衡,则此时杆与地面的摩擦力为(  )

A.mgtgθ

B.mgsinθ

C.μmg

D.μmg

题型:多项选择题

翻译:子曰:“君子求诸己,小人求诸人。”。

题型:多项选择题

全塑电缆型号表示法中“HP”表示()。

A、市内通信电缆

B、配线电缆

C、局用电缆

D、长途通信电缆

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