对低塌达到轻伤的焊接接头，每（）至少检查1遍。
参考答案：季度
方程x（x+2）=（x+2）的根为______．
回答下列问题。
1. How many eyes do you have?
_______________________.
2. How many fingers do you have?
3. How many toes do you have?
4. How many legs do you have?
5. How many hands do you have?
________________________.
