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
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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
信息有一个信源及多个信宿,它体现的信息特征是()
A. 抽象性
B. 层次性
C. 时效性
D. 共享性
教育投资只有通过培养出来的劳动力以及再生产出来的科学技术进入生产领域,才能创造社会物质财富,说明教育投资具有()
A. 周期性长特
B. 弹性大特点
C. 间接性特点
D. 长效性特点