下列做法中能体现对未成年人生命健康进行特殊保护的是（    ）

①学校门口禁止停放任何机动车辆           ②学校定期举行紧急疏散演练

③学校周边摆设很多零食摊位                   ④在学校设立“校园警务室”

则下列说法错误的是（   ）

Mr Green had a little boy. Every day had work he came home and played with his son.
One night ,while Mr Green was at work, he 1 that he had extra work to do for the evening ,and that he wouldn’t be able to play with his son.2he wanted to give the boy something to keep him3. So , looking around his office , he saw a 4with a large map of the world on the cover(封面). He got an 5 He removed the map , tore(撕) it up into small pieces and put all the pieces in his coat pocket.
When he got home , the little boy came running to him and was ready to play. Mr Green6that he had extra work to do and couldn’t play at the moment . Then he 7 all the pieces of the map and put them on the table . He said to the  boy,”8” was a map of the world, and  9th time you put it back together, my extra work will be finished, and we can 10”. Surely, this would keep the child busy for   11  , he thought.
About half an hour later the boy came to Mr Green and said,” Okay, it’s  12 . Can we play now?”
Mr Green said ,“That’s amazing!13did you do that?” The boy said, “It was14. On the back of the page was a picture of a man . When I put the man together the whole world fell into place.”

（160×40－3800）÷65=（   ）

 如图甲是小明同学探究“平面镜成像特点”的实验过程。
a.在水平桌面上铺一张白纸，纸上竖立一块玻璃板，并记下玻璃板的位置。
b.拿另一支完全相同的点燃的蜡烛放在玻璃板的后方，移动到某一位置时，发现该蜡烛与第一支蜡烛的像重合，在纸上记下该蜡烛的位置A₁′。
c.改变玻璃板前蜡烛的位置，重复以上实验，在纸上记录物与像的位置A₂、A₂′；A₃、A₃′（如图乙所示）。
d.点燃蜡烛放在玻璃板前，看到它在玻璃板后面的像，在纸上记录蜡烛的位置A₁。

（1）为便于观察，该实验最好在____ 环境中进行（较明亮/较黑暗）。
（2）实验步骤a、b、c、d的合理顺序是____ （填写步骤前字母），实验中小明发现b步骤很难看清该蜡烛与第一支蜡烛的像是否重合，原因是____ 。
（3）如图乙，分别将实验中的物点与像点连接，发现它们的连线始终与玻璃板面垂直。为了得到平面镜成像的特点，某同学将实验数据填入表中，请把丙图表头填上合适的内容。
①____ ；
（4）如果在像A₁′的位置放一光屏，此时眼睛应该在蜡烛____ (A₁/ A₁′）这一侧观察，光屏上____ （填“能”或“不能”）承接到像。这说明____ 。