问题
多项选择题
四等水准测量一测站的作业限差有（）。
A.前、后视距差；
B.高差闭合差；
C.红、黑面读数差；
D.红黑面高差之差；
E.视准轴不平行水准管轴的误差。
答案
参考答案：A, C, D
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四等水准测量一测站的作业限差有（）。
A.前、后视距差；
B.高差闭合差；
C.红、黑面读数差；
D.红黑面高差之差；
E.视准轴不平行水准管轴的误差。
参考答案：A, C, D
Not long ago, I made up my mind to read a lot of books to get more knowledge. So I went to the library and __36___ happily with several books. But after a few days, I felt impatient. The ___37__ of finishing all of them seemed impossible, because I always found it hard to ___38__ down to read a whole book. I didn’t know what to do with it. Then ___39___ one day I thought of “Why not make reading for fun?” it gave me __40___ again. Reading is a journey of spirit. Every time we read a book, we are actually(事实上) talking ___41___ the writer. I tried to put all my effort into his or her books, __42___ I could feel all of his or her happiness and sadness. Now books have become a part of my life. Attitude (态度) can make a great ___43___. Someone once said, “Even though the situation is bad, people still have one freedom(自由) to __44___ their attitude.” So, don’t complain about study or work. It helps __45___. Try to see things from a different way. I’m sure this will change the situation and help you a lot.
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