为什么顶板破碎处要及时铺网支护？
参考答案：
顶板破碎时如果不铺网支护，容易造成矸石掉落伤人或造成局部漏顶，引发冒顶事故。
四、单词拼写（10分）
61．WTO stands for World Trade ______________(组织).
62. How do you account for your _________(行为)on that night?
63.In tree years he will _______(毕业) from BeijingUniversity.
64.She is __________(满意) with her son’s progress.
65.It’s kind of you to help the ____________(无家可归的) tramp.
66.He’s an __________(突出的，杰出的)example of a hardworking pupil.
67.One __________(成年人) and two children ,please.
68.There must be something__________(理解).
69.Work was little_______(吸引力) for him.
70.My ___________(发动机) is always breaking down.
根据埃里克森的人格发展阶段理论，中学阶段青少年的发展任务主要是( )。
A．自主感对羞愧感
B．勤奋感对自卑感
C．亲密感对孤独感
D．自我同一性对角色混乱
