问题 完形填空

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

※※注意:此题在答题卡上作答,如选E涂AD、如选F涂BD,如选G涂CD。

Getting your children to study can be a little like getting them to eat their vegetables.

_____1_____ Make a study time and have it at the same time every day. This will help your kid to learn to schedule their day and will give them a sense of control over how they spend their time.

Allow them to study in block of time, such as for half an hour with a five-minute break in the middle. _____2______ Ideal (理想的) study times are after dinner or right after school before dinner.

Never allow your children to study in front of the television, as that will encourage passive activity. ______3______

You will also need to help your kids find the right place to study. After you’ve set up a good study time for little learners,  set up a good place where they can get those creative juices flowing.

____4______Make sure there is a table or a desk and comfortable chair.

______5______This includes helping them out with their home work sometimes and being there for them with the answers to any questions. The input you give your children during study periods will help form a bond and help make studying enjoyable.

A. Pick a place where your children can study properly.

B. Hold them to the schedule they create for themselves.

C. Finally , spend time with your kids when they are studying.

D. Keep the atmosphere light and offer lots of encouragement, too.

E. Instead, use TV as a treat or a reward when homework is completed.

F. Try to stop this bad habit by offering some sort of reward.

G.One of the best ways to form good study habits for your kids is to design a schedule that they keep to.

答案

小题1:G

小题1:B

小题1:E

小题1:A

小题1:C

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“嫦娥一号”最重的载荷之一,“激光眼”的正样产品目前已装星.在上海可以见到其初样产品,“身长”30厘米,“体重”15公斤,看上去像是一台放在铁盒子里的摄像机,但它“拍”的东西可不是平面影像,而是三维立体的.令专家自豪的是,中科院上海技术物理研究所和上海光学精密机械研究所在以往科研基础上,仅用两年时间便按时交付这只“激光眼”,关键部件全部实现国产,整体水平达到国际先进,并即将成为我国首台发射进入太空的激光高度计.“激光眼”的制图形式非同一般,不是靠成像,而是靠“秒表”.“激光眼”会向月球不断发射和接收反射回来的激光,并不断精确计时.“嫦娥一号”有了它,就好似向月亮表面一个接一个派出“光速短跑队员”,这些“运动员”一触到月面就即刻原路返回;“激光眼”根据其“跑步”成绩,就能实时计算出其所跑距离,从而分辨出月面哪高、哪低,哪是山脉、哪是盆地,最终得到各处的实际海拔,合成为一幅带有月球高程的完整地形图.

按计划,在“嫦娥一号”进入环月阶段后,“激光眼”便开始工作,不论月球表面是白天还是黑夜,也不论卫星处于正飞还是侧飞,都将长期开机,在200公里轨道高度上,每隔一秒发射一束激光.就这样,“嫦娥一号”像绕绒线球一样,围着月亮转了一圈又一圈,留下一个个激光“足印”,把月表状况统统扫描下来.

1、“激光眼”的工作原理之一是利用了光的______.它主要测绘了月球表面的______.

2、能否利用超声波代替激光来完成同样的工件?为什么?

3、如果月球表面是平原,“激光眼”发射激光和受到月球反射的激光的时间差为多少秒?如果实际时间差比它长则该处可能是高山还是盆地?