题目

When your child is supposed to be doing homework, are they chatting with their friends on Facebook or playing games? Many studies have shown that multitasking doesn't     1    ,     2     your child is probably proudly claiming they can do ten things     3    ! Many people believe that they can     5     two or more tasks at the same time, but Dr. Edward Hallowell says this is     5    . The reality is that multitasking     6     poor job performance. New handheld     7     such as smartphones, iPads, games and social networking si人体结构和功能的基本单位是______．神经系统结构和功能的基本单位是______．生物体遗传物质的基本单位是______．泌尿系统的基本单位是______．