问题
单项选择题
美国圣垂FSB型保护器有（）级机械密封。
A.1
B.2
C.3
D.4
答案
参考答案：C
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美国圣垂FSB型保护器有（）级机械密封。
A.1
B.2
C.3
D.4
参考答案：C
阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中选出最佳选项。 Last night I was driving from Harrisburg to Lewisburg, a distance of about 80 miles. It was late, I was late, and I was driving _________. At one point along an open highway, I came to a crossroads with a traffic light. I was _________ on the road by now, but as I came near the light, it turned _________, and I braked to a stop. I looked left, right, and behind me. Nothing. Not a car, no suggestion of headlights, _________ there I sat, waiting for the light to _________, the only human being, for at least a mile in any _________. I started wondering why I _________ to run the light. I was not afraid of being caught, because there was _________ no policeman anywhere around and there certainly would have been no _________ in going through it. Much later that _________, after I’d met with a group in Lewisburg and had climbed into bed near midnight, the question of why I’d stopped for that light _________ me. I think I stopped _________ it’s part of a contract(契约) we all have with each other. It’ s not only the law, but it’s an agreement we have, and we trust each other to follow _________: we don’t go through red lights. We do _________ we say we’ll do. We show up when we say we’ll show up. I was so _________ of myself for stopping for that red light. And as no one would ever have known what a good person I was on the road from Harrisburg to Lewisburg, I had to tell s someone.
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