随着互联网的普及、电子商务和物流业的发展,网上购菜的家庭越来越多。人们凭借信用卡通过“电子菜箱”非常容易买到自己所需的各种放心菜。假如其他条件不变,网上购菜越来越普遍将使（   ）

物体作匀加速直线运动，已知第 1s末的速度是 6m/s，第 2s末的速度是 8m/s，则下面结论正确的是（   ）

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    Xiao Qiang, a 12-­ year­-old Chinese boy, has too many activities. His father 1 him away from school four afternoons a week and drives him across town to practice. "I do most of my 2 in the car when we are 3 to practice, and I have to do the rest when I get home. I am too tired. I just want to sleep." He said.

    "More and more kids become unhappy 4 they have too many activities to do." aid Mr. Wang, an expert of child development. "41% of the children aged 9－13 said they felt 5 most of the time, and more than 75% of them said that they wished they had more 6 time to play.

    "Over­scheduling is a growing problem for Chinese families." said Mr. Wang. It is not good for both kids and their parents. More families eat dinner 7 or often eat fast food 8 their way to football practice or music lessons. We all know it is important for kids to learn how to relax. If they don't learn that now, it will be more difficult to learn when they get 9. Kids need time to relax. Parents should 10 about what is right for kids.