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【单选题】
设【图片】 是3阶矩阵, 且 【图片】, 其代数式【图片】, 则【图片】 的伴随矩阵 【图片】 的特征值为A.
0,-2,1
B.
0,1,1
C.
0,0,-2
D.
0,0,1
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【单选题】Those who want to say anything more _________ your hands and then_______ to speak.
A.
rise; raise
B.
raise; rise
C.
raise; raise
D.
rise; rise
【简答题】In the world ,soccer of football is the most popular sport. This is because many countries have wonderful teams for the World Cup. The World Cup is held every four years. To remember 2002 FIFA World C...
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【单选题】What's under the desk? _____. [ ]
A.
It's a football
B.
I can see a set of keys
C.
They are red box
D.
There's a cat
【单选题】根据《出境人境管理法》规定,外国人( ) 准许人境。
A.
未持有效出境人境证件的
B.
入境后从事与签证种类相符的活动的
C.
具有《出境人境管理法》规定的不予签发签证情形的
D.
逃避接受边防检查的
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