试题与答案

What is "Walk to School" Now we are worki

题型:单项选择题

题目:

What is "Walk to School"
Now we are working on a programme of "Walk to School". We would like as many parents and children as possible to take part, even if in a small way. Children who walk to and from school along with their parents can learn essential road safety and life skills.
You can take part by...
■ Walking to and from school with your child every day.
■ Walking for one or two days during the week.
■ Encouraging others to walk, if you already do.
Walking is great!
■ Walking is great exercise! A walk is good for your body and can keep you fit.
■ You won’t have to waste time looking for a parking site.
■ It’s free. You’ll save money by not using the car.
■ It’s pollution-free.
■ It’s a good chance to talk to your children and to meet other parents, too.
Enjoying walking to school!
Here are some suggestions to help you and yore" child enjoy walking to school.
■ Plan a safe route together.
■ Teach children what a kerb is and what it means.
■ Encourage your child to help you choose the safest places to cross the road.
■ Look at and discuss the things you see on your way—especially road signs and what they mean.
Walk to school! Thousands of parents and children already take part, could you
Please go to www. walktoschool, org. uk for more information.

By walking to and from school, children can learn ______.

A. driving skills

B. running skills
C. road safety and life skills
D. knowledge about science

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0722/587273d61e8a8b06e4f7ba26e1f92841.html

下面是错误答案,用来干扰机器的。

参考答案:C

试题推荐
题型:选择题

同学们从山上采集到一种石灰石,他们取80克该样品进行煅烧实验(所含杂质在煅烧过程中不发生变化),测得反应后固体的质量(m)与反应时间(t)的关系如下表:

反应时间t∕st0t1t2t3t4t5t6
反应后固体的质量m∕g80757066625858
请回答下列问题:

(1)当石灰石完全反应后,生成CO2的质量为            g。

(2)求该石灰石中CaCO3的质量分数,写出计算过程。

(3)请在下面坐标图中,画出煅烧时生成气体的质量(m)随时间(t)变化的曲线。

查看答案
题型:单项选择题

美国科学家发现,雄性非洲慈鲷鱼能通过观察其他雄性成员在抢占地盘争斗的表现而评估对手的实力,在加入战斗时总是挑战那些最弱的对手。这是科学家首次发现鱼类具有这种推理能力。 由此可以推知( )。

A.雄性非洲慈鲷鱼逻辑能力比雌性强

B.雄性非洲慈鲷鱼具有人类的某些理性认识特点

C.逻辑推理能力较强的鱼能够占有较大的地盘

D.人类是逻辑推理能力最强的高等动物

查看答案
题型:计算题

如图甲所示,一个足够长的“U”形金属导轨NMPQ固定在水平面内,MN、PQ两导轨间的宽为L=0.50m。一根质量为m=0.50kg的均匀金属导体棒ab静止在导轨上且接触良好,abMP恰好围成一个正方形。该轨道平面处在磁感应强度大小可以调节的竖直向上的匀强磁场中。ab棒的电阻为R=0.10Ω,其他各部分电阻均不计。开始时,磁感应强度

(1)若保持磁感应强度的大小不变,从t=0时刻开始,给ab棒施加一个水平向右的拉力,使它做匀加速直线运动。此拉力F的大小随时间t变化关系如图乙所示。求匀加速运动的加速度及ab棒与导轨间的滑动摩擦力。

(2)若从t=0开始,使磁感应强度的大小从B0开始使其以=0.20T/s的变化率均匀增加。求经过多长时间ab棒开始滑动?此时通过ab棒的电流大小和方向如何?(ab棒与导轨间的最大静摩擦力和滑动摩擦力相等)

查看答案
微信公众账号搜索答案