When he returned home three days later, he found the TV set in the sitting room ________.
A. lost
B. disappearing
C. going
D. missing
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The organization __________ food and blankets to the earthquake victims.
A. grabbed
B. gained
C. distributed
D. reacted
The manager did a poor job in the company and was _________ by someone else.
A. renewed
B. resumed
C. refused
D. replaced
n阶矩阵A与对角矩阵相似的充要条件是( )
A有n个不同的特征值
B. A有n个非零的特征值
C. A有n个线性无关的特征向量
D. A有n个不同的特征向量
在结构化程序设计思想提出之前,在程序设计中曾强调程序的效率,现在人们更重视程序的( )性。
A. 技巧性
B. 保密性
C. 一致性
D. 可理解性