当采取接闪器保护封闭气罐时，其外表面的（）区爆炸危险环境可不在滚球法确定的保护范围内。
参考答案：2
We will go for a picnic if it _____ tomorrow. [ ]
A. doesn't rain
B. wasn't rainy
C. won't rain
D. wasn't raining
