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问题 单项选择题

超声测量胎儿股骨长度，怎样才能避免较大的测量误差（）

A.用线阵式超声探头

B.采用凸阵式超声探头

C.采用扇扫式或小凸阵探头

D.声束与胎儿股骨尽可能保持垂直

E.声束与胎儿股骨尽可能保持平行

答案

参考答案：D

单项选择题

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.

Who are encouraged to take part in the programme of "Walk to School"

A. Children.

B. Parents and children.
C. Bus drivers.

D. Teachers.
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单项选择题

近几年，社会各界对土地管理制度改革的呼声日趋强烈。十八大报告明确要求“改革征地制度，提高农民在土地增值收益中的分配比例”，“促进城乡要素平等交换和公共资源均衡配置”。改革征地制度旨在（）

A.调整上层建筑与经济基础不相适应的部分

B.调整生产关系中与生产力不相适应的部分

C.推行我国农村土地等生产资料迈向私有化

D.表明社会主义的对抗性矛盾依然没有解决
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