施工现场地处闹市区交通主干道边，施工企业与供货商签订砂、石材料供货合同后，需要将砂、
题型：单项选择题 案例分析题
问题：
施工现场地处闹市区交通主干道边，施工企业与供货商签订砂、石材料供货合同后，需要将砂、石材料从郊区运至施工现场。项目部联系8t砂石运输车3辆，避开市区道路交通高峰时间段，将材料运回现场，堆放在砂、石堆场。
我国铁路运输中近（）是运输建筑施工所用的各种材料，部分材料的价格组成因素上甚至绝大多数是运输费用。
A.1/10
B.1/5
C.1/4
D.1/2
题型：单项选择题 案例分析题
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Mobile phones are everywhere in big cities. I t seems that 1 can survive without one. Mobile phones are a great 2 to stay connected with friends and family. 3 , it is important to remember that there are certain times 4 you should not be using your phone, especially as a student, during school. 5 you are in class, you should not be sending your friends tex  t messages 6 taking phone calls. Your classmates and teacher should not have to deal with this rude 7 . Aren't you at school to learn? In the United States, students would never be allowed to 8 their mobile phones during class. If you were to send or 9 a text message you would probably be kicked 10 class. It is very disturbing to hear a lot of tones and ringing during 11 . There are many more rules for mobile phone use in America and it is to 12 respect for those around you. As a teacher in China, I have to 13 students using mobile phones every day. I have told my class to 14 their phones, but many students do not listen. The 15 to be connected all the time seems to be more 16 than the desire to learn. It's easy to understand 17 it is so tempting(诱惑人的) to have your phone on during class. It seems so easy just to send a short text message; it's not hurting anyone, is it? But you may actually be hurting 18 when you do this. Your teacher knows when you use your phone and may give you a 19 grade. Sending a text message also takes your attention away from what's going on in class, you may 20 something important. | ||||
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