光缆在穿越土堤时，宜采用爬堤敷设的方式.光缆在堤顶的埋深不应小于（），在堤坡的埋深不应小于（）。堤顶部分兼为公路时，应采取相应的防护措施。若达到埋深要求有困难时也可采用局部垫高堤面的方式，光缆上垫土的厚度不应小于（）。
A.1m，80m，0.5m
B.1.2m，100m，0.8m
C.1.5m，120m，1m
D.1.8m，120m，1.5m
参考答案：B
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| Have you ever heard of the saying, "if you want a friend, be 1 !" what does it 2 ? There are many different things that you can do to 3 friends. You may find out what they are if you 4 someone make friends. Here is 5 one new teacher made friends with the 6 in her class on the first day of the school. When the bell 7 , the teacher smiled at all the students. Then she said, "Good morning. How nice it is to have all of you 8 my class this year! I want to 9 each of you very much. I am sure we will enjoy working together." The teacher smiled, used a pleasant 10 and acted 11 a friendly way. She told the students her 12 and wrote it on the blackboard. Then she told them something she liked to 13 and hoped to do with them during the year. The students knew that she liked many of the same things they like. Everyone felt that she 14 what she said. Each of them wanted to know 15 and be her friend. Then she let the students tell something about 16 . So they felt that the teacher knew them. Could you make friends as the teacher 17 ? How do you know and like your classmates? One 18 is to find out more about them. During the 19 you can talk to them. You may ask them their names and the names of the schools they went to last year. They want to know about you, too. You may tell them about your interests or your holiday experiences. It is often easy to be friends with people who have the 20 interests and play the same games. As you talk, the others may be thinking." I like to do. It should be fun to be friends with you." Remember! Just talking together in a friendly way is one good way to make friends. | ||||
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