120km/h及以下运行区段锚段长度在800m及以上的承力索接头数量限界值不得超过（）个。
A.2
B.3
C.4
D.5
参考答案：D
翻译句子。
1. A group of students are taking photos in raining days.
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2. What does your father usually do when it's snowing?
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