高铁、支付宝、共享单车、网购成为中国的“新四大发明”，已走进寻常百姓的生活。如图所示是在城市街道旁随处可见的共享单车，下列说法中正确的是

题干

高铁、支付宝、共享单车、网购成为中国的“新四大发明”，已走进寻常百姓的生活。如图所示是在城市街道旁随处可见的共享单车，下列说法中正确的是（）

A：用车时需要使用手机扫取共享单车上的二维码，这是利用超声波来传递信息的

B：共享单车的车座做的较宽是为了减小压强

C：此时静止的共享单车对水平地面的压力与共享单车的重力是﹣对平衡力

D：蹬车车前进，停止瞪车车将慢慢停下来，说明力是维持物体运动的原因

上一题下一题 0.0难度选择题更新时间:2017-06-04 12:36:13

答案(点此获取答案解析）

B

同类题5

根据上面内容判断正误，正确的写（T），错误的写（F）.
     There are many clubs in our school. Let me tell you what they are.
     Do you like playing tennis? It's OK if you can't play tennis. Mr. Qing can teach you. Come and join the tennis club!
Do you like acting? Do you like to work with other young people? Do you want to be in the school play? Come and join the acting club.
Can you dance? Do you like Latin (拉丁) dance or Chinese traditional (传统的) dance? Join the dance club and dance for the Christmas (圣诞节) show.
    Do you like French food? Can you speak French? Do you want to learn French? Join the French club now.
____ Mr. Qing can teach you French.
____ If you join the acting club, you can act in the school play.
____ Christmas Day is coming.
____ You can learn French in the French club.
____ There are three clubs in the school.

题干

答案(点此获取答案解析）

同类题1

同类题2

同类题3

同类题4

同类题5