市场信息可为人们带来程度不同的效益,或是经济效益,或是社会效益,或者同时带来两种效益,这体现了市场信息具有()
A. 价值性
B. 时效性
C. 竞争性
D. 可变换性
The students in the class were _____four groups before they started the game.
A. divided into
B. separated into
C. divided from
D. separated from
He’s got himself into a dangerous situation he is likely to be accused of meeting someone.()
A. where
B. which
C. while
D. why
“事以密成,语以泄败”说明信息的传递应()
A. 准确
B. 及时
C. 安全
D. 全面