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【单选题】
已知三阶矩阵A的特征值为1，2，3，则行列式|A 2 |=( )A.
0
B.
1
C.
6
D.
36
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【单选题】—Our school boy basketball players won the championship at the 2013 City Basketball Match. — . They had been training that hard.
A.
That depends
B.
That figures
C.
That counts
D.
That matters
【单选题】–The players in Super Brain can work out different problems in a very short time. – they are! They have super brains indeed.
A.
How interesting
B.
How amazing
C.
What interesting
D.
What amazing
【单选题】Tom's team is _______ 55 players while Mary's _____ 70 players. [ ]
A.
composed of; makes up
B.
consisted of; makes up of
C.
made up; consists of
D.
made up of; consists of
【简答题】某企业采用96%铸造用硅砂,主要粒度组成为4筛,首筛号40,尾筛号100,其中100号筛上砂量较大,其粒度的平均细度为53。请写出该砂的牌号。
【单选题】While playing chess, the two players usually sit ______ each other.
A.
beside
B.
opposite
C.
against
D.
between
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