请阐述防火门的设置要求和分级标准？

阅读短文，判断正(T)误(F)。

     Zhang Hua is a student of Red Star School. Tomorrow is New Year's Day. Zhang Hua and his

classmates are going to see their teacher. Miss Li. Tomorrow is also Miss Li, their English teacher's

birthday. They will buy some gifts and a nice birthday card for her. Yang Yang will sing  "Birthday

Song" for Miss Li. They think Miss Li likes flowers best. So they want to buy a basket of flowers

for her. Her house is on Nanjing Road. It's near the school. The students are going there on foot.

Miss Li is such a good teacher that her students love her very much. 

( )1 The English teacher's birthday is on December 31st (12/31).

(     )2 Tomorrow the students will go to Zhang Hua's house

(     )3 Miss Li will sing a song for Yang Yang.

(     )4 Miss Li likes flowers best.

(     )5 The students will take a bus there.

(     )6 The students love their teacher very much.

下列加粗词语的意义相同的一组是[ ]

A．①老孙头慷慨地说：“我那玻璃眼倒也乐意换给她，就怕马儿性子烈，她管不住。”

　 ②刘胡兰这位十七岁的英雄慷慨就义了。

B．①两岸的豆麦和河底的水草所散发出来的清香，夹杂在水气中扑面吹来；月色便朦胧在这水汽里。

　 ②这朦胧的橘红的光，实在照不了多远。

C．①“夜雨剪春韭”是老杜的诗句吧，清新极了。

　 ②老圃种菜，一畦菜怕不就是一首更清新的诗？

D．①他的面孔黄里带黑，瘦得让人担心，但是精神很好，没有一点儿颓唐的样子。

　 ②他少年外出谋生，独立支持，做了许多大事。哪知老境却如此颓唐！

某校研究性学习小组参观考察了黄道婆墓、江南制造总局原址 (江南造船厂内)和人新公司原址(第一百货商店)三处历史文物建筑后，讨论拟定一个研究性课题。能完整体现本次考察内容的课题是

A．近代向现代变迁的上海社会

B．上海由手工业向工业的渐进

C．从传统走向现代的上海经济

D．上海中西方文化交融的历程

微型断路器又称导线保护开关，用于保护导线、电缆和控制照明及小型电动机。

饱水岩土在重力作用下，通过2～3天释水后，空隙中尚能保持的水分为( )。

A．田间持水率

B．饱和含水率的一半

C．零

D．饱和含水率