防火防爆安全措施有哪些？

阅读理解。    

     My grandfather is a happy old man. He is tall and thin. Today he is sixty years old. My father and

mother come to his home with me. We take a big cake. It's very beautiful. On the cake there is a

picture. A crane (仙鹤) is in a pine (松树). My mother says it's a good hope for my grandfather. We

all say ‘Happy Birthday’ to my grandfather. Then we share (分享) the big cake. It's yummy. My

grandmother cooks noodles for us. There are some pink peaches on the table. They are big and sweet.

I like them very much. There is some fish and chicken on the table, too. Chicken is my father's favourite

food and fish is my mother's favourite food.

     My grandfather has a happy birthday and we all have a good time.

判断下面的句子与短文内容是否相符，在括号中打√或打×。

( )1. Today is my grandfather's sixtieth birthday.

( )2. My parents and I go to grandparents' home today.

( )3. We buy a nice picture for grandfather and there is a cake on it.

( )4. My father likes fish very much.

( )5. We often eat noodles on birthday to wish a long life (生命).

德国社会学家韦伯首创了社会分层理论，这一理论的核心是划分社会层次的三冲标准：（）。

工程技术总结是工程项目竣工后对工程建设全过程在（）、（）、（）等方面取得的经验及教训的总结。

市场结构

地震后被埋压住怎么办（）

A、如果可以自救，则扒开掩埋物，使身体脱出，摆脱困境

B、如果无法自行脱困，争取寻找或扩大可呼吸的空间

C、若已骨折，不要轻易移动，应等待救援

D、尽力向外抽拉身体