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【判断题】
若向量组 可由向量组 线性表示,而向量组 的秩 ,向量组 的秩 ,则 . ( )A.
正确
B.
错误
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举一反三
【单选题】It can be concluded from the third paragraph that______.
A.
ADHD is actually a genetic disease
B.
girls are more likely to have epilepsy
C.
an autist definitely has other mental disorders
D.
autism often happens with other cognitive disorders
【单选题】11-1710-7.某企业在制定产品价格时,参照主要竞争者的价格来定价,这种竞争导向定价法属于
A.
感知价值定价法
B.
拍卖定价法
C.
密封投标定价法
D.
随行就市定价法
【简答题】C Our brains work in complex and strange ways．There are some people who can calculate the day of the week for any given date in 40,000 years, but who cannot add two plus two．Others can perform complex...
【单选题】Which of the following can be inferred from the passage?
A.
After five years of intensive treatment, Adam has completely recovered.
B.
Mental retardation can result in autism.
C.
Parents should know some key symptoms of autism so that they can spot the disorder.
D.
Diagnosing autism in children is not difficult.
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