井巷临时支护有锚喷支护、锚杆支护、金属拱形支护、梯形支护、前探支护等。
参考答案：对
已知抛物线C1的解析式是y=2x2-4x+5，抛物线C2与抛物线C1关于x轴对称，求抛物线C2的解析式．
根据句意用括号中所给单词的适当形式填空。
1. I'd like a pair of _____, please (shoe).
2. They talked on and on very _____ (happy).
3. The _____ are building a tall building. (work)
4. This bag isn't Lucy's , It's _____ sister's. (she)
5. The first lesson is the _____ of all. (easy).
