根据围岩与煤层的相对位置,可将顶板分为伪顶、直接顶、老顶。

题型:判断题

问题:

根据围岩与煤层的相对位置,可将顶板分为伪顶、直接顶、老顶。

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题型:判断题
完形填空。
      A professor (教授) told his students to go into the city slums (贫民窟) to study the life of 200
boys. He asked them to  1  reports about each boy's life and future. Every one of the students wrote,
"He doesn't have any hope. "
    Twenty-five years  2 , another professor read about the earlier study. He told his students to  3  
what had happened to the boys. They tried very hard and found that 176 of the boys had become
successful   4   doctors, teachers and scientists.
    The professor was very  5  and decided to study further. Luckily, all the men were living near the
place and was able to ask each one,"What made you   6 ?"Each one answered,'There was a teacher. "
    The teacher was  7   living there so the professor found her and asked the old woman  8  she had
used to pull those boys  9  the slum, and change them into successful people.
    The teacher's  10  began to shine and said with a sweet smile. "It's really very easy.I loved those
boys. "
( )1. A. read    
( )2. A. later    
( )3. A. search  
( )4. A. for      
( )5. A. glad    
( )6. A. wonderful
( )7. A. already  
( )8. A. what    
( )9. A. out      
( )10. A. face    
B. study    
B. after    
B. find out  
B. With      
B. angry    
B. successful
B. yet      
B. who      
B. into      
B. eyes      
C. write    
C. ago      
C. look for  
C. as        
C. surprised
C. rich      
C. even      
C. which    
C. away      
C. hair      
D. take    
D. before  
D. see    
D. like                    
D. worried
D. popular
D. still  
D. when    
D. out of  
D. mouth  
题型:判断题

若关于x的方程x2-2x-m=0有两个相等的实数根,则m的值是(    )

题型:判断题

中国古代畅行“三纲五常”的道德规范。遇到君主或长者时不能直呼其名,书写不能使用这些字,只能改字、改音或减少字的笔划予以回避。在唐代“观世音菩萨”因与太宗李世民都有“世”字,而被简为“观音菩萨”之说。上述情况表明

A.在中国古代人们不能平等享有名誉权

B.在中国古代人们不能平等享有肖像权

C.在中国古代人们不能平等享有荣誉权

D.在中国古代人们不能平等享有姓名权

题型:判断题

β-折叠结构的特点是:(1)肽段伸展呈();(2)在片层中个肽段走向可以是();也可以是();(3)氢键是在()之间形成;(4)R伸向锯齿的()方。

题型:判断题

为了使无线信号有较大的信噪比,提高数据传输的稳定性和可靠性,一般______。

A) 不要将AP连接到天线上
B) 都要将AP连接到天线上
C) 都要将AP连接到室内天线上
D) 都要将AP连接到全向天线上

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