[单选题]商业用户室内燃气管道的最高为(　　)Mpa。
A.0.2
B.0.4
C.0.6
D.0.8

在角色表演区，我们经常见到下面的情况：一天，开开家的"妈妈"跑来跟我说："老师！老师！我们家的宝宝生病了！"老师："那怎么办呀？""妈妈"说："他需要找爸爸。"说着"妈妈"掏出"手机"（一只洗发水瓶子）："喂喂喂！爸爸！快回来！我们宝宝生病了！"孩子的想象力是十分丰富的，一个小小的洗发水瓶子就有无数种变化，"手机"就是一个很好的例子。我想一个简单的洗发水瓶子尚且如此，那我何不再准备些其他的未成型玩具呢？所以我在娃娃家旁边新添了一个百宝箱，里面专门放了一些废旧物品（如包装盒、饮料罐等等）。在游戏中，每次一开始百宝箱里的东西都会被一抢而空，有时还有争抢现象，但娃娃家里的家具、物品在幼儿的添置下不断丰富，幼儿也想出了很多不同的玩法，孩子之间交流也明显增加。
教师引导幼儿讨论：
教师：今天娃娃家旁边新添了百宝箱，你们在百宝箱里发现了什么好东西呢？
幼儿1：月饼盒。
幼儿2：罐子。
幼儿3：……
教师：那你们用这些东西做了什么呢？
幼儿1：我用大的盒子做了电视机，和宝宝一起看电视了！
幼儿2：我用可乐瓶做了热水壶，给小客人倒水喝。
幼儿3：……
教师：我发现玩具一多有小朋友开始抢了起来。
幼儿1：要分享，大家一起玩。
教师：那抢的时候怎么解决呢？
幼儿1：谁先拿到就是谁玩！
幼儿2：石头剪刀布。
教师：那下次玩娃娃家时我们可以继续想想办法，把百宝箱的东西玩起来，可不能再抢啦！

At the end of last year, a town called Friendship Heights, in Maryland’s Montgomery County, approved America’s (and thus the world’s) strictest tobacco policy. Town officers courageously banned smoking on all public property, including streets, pavements and public squares. "It’s a public health issue," said the mayor, Alfred Muller. who is also a doctor. "We don’t have the right to outlaw tobacco. but we’re doing what we can within our rights."
This newspaper has expressed disgruntlement with the element of intolerance that is increasingly manifesting itself within America’s anti-tobacco movement. It must be said, however, that brave Friendship Heights has discovered an approach that liberals can embrace. Private property is its owners’ sanctuary, but the public rules in public spaces. Undeniably, the streets belong to the government; what happens in them. therefore, is the government’s business.A. Smoking is banned in public places.
B. People are forbidden to eat fatty food on all public property.
C. People are restricted in emitting carbon dioxide in public places.
D. People are not permitted to read newspapers with shrieking headlines