钢筋冷弯试验是一种较严格的检验，能揭示钢材内部是不是存在组织不均匀、内应力和夹杂物等缺陷。( )
参考答案：对
根据句意及首字母提示完成单词。
1. There are many animals in the z______.
2. What o______ things can you see in the picture?
3. The old man is f______ to us. We love him very much.
4. The little girl is very s______. She hides (躲藏) behind her mother.
5. Tom never (从不) does his homework, he is very l______.
最佳的混合制粒时间一般为（）min。
A．4-5
B．3-4
C．5-6
