问题
单项选择题
ZN63A型断路器在规定操作电压下，连续正确、可靠分、合闸各50次，其中在额定电压下，进行“分闸-0.3s-合闸一分闸”操作（）次。
A.10
B.15
C.25
D.5
答案
参考答案：D
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ZN63A型断路器在规定操作电压下，连续正确、可靠分、合闸各50次，其中在额定电压下，进行“分闸-0.3s-合闸一分闸”操作（）次。
A.10
B.15
C.25
D.5
参考答案：D
They huddled （挤在一起） inside the storm door – two children in dirty old coats. “Any old __36___ , lady?” I was __37__ with my household budget (预算). I wanted to say no --- until I looked down at their __38__ . Thin little sandals (凉鞋), __39__ through. “Come into the front room and I’ll make you a cup of hot __40__ .” There was no conversation. Their wet sandals left __41__ upon the hearthstone (壁炉的石头). I __42__ them cocoa and bread with jam (果酱) to __43__ against the cold outside. Then I went back to the kitchen and started __44__ on my household budget. I __45__ the silence in the front room and looked in. The girl held the empty __46__ in her hands, looking at it. The boy asked in a flat voice, “Lady ... are you rich?” “Am I rich? No!” The girl put her cup back in its saucer (碟子) – __47_ . “Your cups __48__ your saucers.” Her voice was old, with a __49__ that was not of the stomach. They left then, holding their newspapers __50__ the wind. They hadn’t said __51__ . They didn’t need to. They had done more than that. Plain blue pottery cups and saucers. __52__ they matched. I tasted the potatoes and stirred (搅拌) the gravy (肉汁). Potatoes and brown gravy, a roof over our heads, my man with a good steady job – these things matched, too. I moved the chairs back from the fire and cleaned the living room. The muddy prints of small sandals were __53__ wet upon my heart. I let them be. I want them there __54__ I ever forget again how very__55__ I am.
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ated