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【单选题】
火焰原子化法最常用的火焰是( )。A.
空气-乙炔
B.
空气一氢气
C.
氧气-氢气
D.
氧气-氩气
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举一反三
【简答题】阅读理解。 It's Sunday. There are many people in the bus. An old man is looking here and there. He wants to find an empty seat. Then he finds one. He goes to it. A small bag is on the seat. And a young man...
【单选题】Mr. White , many customers want to see you._______ they wait here or outside?
A.
Will
B.
Shall
C.
Can
D.
Would
【单选题】听力原文：W：You see，there are too many people here．Let's so to some other places． M：All right．But cold weather in December cannot keep people from the busy shops． Q：What does the man mean? (14)
A.
The shops are not crowded in December.
B.
Many people go shopping despite the cold in December.
C.
People dislike to do shopping in busy shops in winter.
D.
In December people usually stay at home because of the cold weather.
【单选题】关于MDS算法,下面哪一项是正确的算法流程? 1 取前$l$个最大特征值构成对角矩阵$\mathbf{\Lambda}_l$,用对应的特征向量按列组合成$\mathbf{U}_l$ 2 降维后的数据矩阵计算方法为:$\mathbf{Z}=\mathbf{U}\mathbf{\Lambda}^{1/2}$ 3 由距离矩阵$\mathbf{D}$计算矩阵$\mathbf{B}$ 4 对矩阵$\math...
A.
①②③④
B.
①③②④
C.
③②④①
D.
③④①②
【单选题】下列哪项是距离向量算法(DVA – Distance Vector Algorithm)的别名( )
A.
Dijkstra算法
B.
SPF算法
C.
Bellman-Ford算法
D.
LSA
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