避雷引下扁铁焊接应满焊，焊接面积为扁钢宽边的（）倍，扁铁两边均应焊接。敲掉焊渣后应作（）处理。
参考答案：两；防锈
I'11 go hiking with Bruce if it tomorrow.
A．doesn't rain
B．didn't rain
C．won't rain
D．hasn't rained
—Hi, Jim. What about the weather in London?
—Terrible! ______. So I have to stay at home. [ ]
A. It's rainy
B. It's sunny
C. It's cloudy
D. It's fine
