【单选题】m为有理数,且方程2x 2 +(m+1)x-(3m 2 -4m+n)=0的根为有理数,则n的值为( )
【简答题】分析下图所示电路功能,写出F 1 和F 2 逻辑函数表达式,说明电路功能。
【简答题】打开示例文档 .docx 文件,将文件另存为示例文档保护,利用分节保护对正文进行保护,密码 123 。 示例文档.docx
【单选题】听力原文:There are two factors which determine an individual's intelce. The first is the sort of brain he is born with. Human brains differ considerably, me being more capable than others. But no mat...
A.
Children reared under average conditions possess average intelce.
B.
Lack of opportunity prs the growth of intelce.
C.
An individual's intelce is determined chiefly by his environment.
D.
Changes of environment produce changes in the brain structure.
【单选题】听力原文: There are two factors which determine an individual's intelce. The first is the sort of brain he is born with. Human brains differ considerably, some being more capable than others. But no ...