胸墙有哪些形式?如何选择?
参考答案:胸墙的结构形式有:
当胸墙的跨度小于5.0m,宜采用实心板式;
当胸墙的跨度大于5.0m,宜采用肋形结构,即板梁式结构。
简述钢筋拉伸试验主要步骤和操作要点。
补全对话。
A: Hello, Tom. How are you?
B: I'm fine, ___1___ you. And you?
A: I'm OK. ___2___ me, ___3___ this in English?
B: It's a ___4___
A: Is it your backpack?
B: Yes, ___5___ ____6__.
A: And what is that in ___7___ ? Is it a pen?
B : No, it ___8____. It's a pencil.
A: ___9___do you __10____ it?
B: P-E-N-C-I-L.