问题
单项选择题
二进制数0111110转换成十六进制数是
A．3F
B．DD
C．4A
D．3E
答案
参考答案：D
解析：解析：二进制整数转换成十六进制整数的方法是：从个位数开始向左按每4位二进制数一组划分，不足4位的前面补0，然后各组代之以二位十六进制数字即可。
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二进制数0111110转换成十六进制数是
A．3F
B．DD
C．4A
D．3E
参考答案：D
解析：解析：二进制整数转换成十六进制整数的方法是：从个位数开始向左按每4位二进制数一组划分，不足4位的前面补0，然后各组代之以二位十六进制数字即可。
完形填空（本题有15小题，每小题1分，共15分） 阅读下面短文，然后从各题所给的四个选项中选出一个最佳答案。  When high school started, Sally and I became best friends. We shared many interests and quickly became very close．When high school ended, we both cried because we would enter different 1 in autumn． Our first term of college life was 2 , so we often sent long e-mails and encouraged each other. We missed each other so much! In the second term, I found some new friends and I felt very 3 with them. These were friends with whom I could be myself and pour out my feelings. I was eager to share my new friends with Sally． When Sally 4 visited me at my school, we were excited. She brought a toy bear to me 5 a present and told me about her college life. 6 , something unexpected happened when I introduced her to my new friends．Her eyes grew dark and I could see the sadness in them．My new friends tried to share their friendship, but Sally seemed unwilling to accept it．I didn't understand 7 the people I loved most couldn't love each other． Sally left. I knew she was not happy. I thought long about what had happened. I asked her many questions but she didn’t answer me. I 8 that she was jealous. She saw me with my new friends and was afraid that we no longer shared the same experiences. She saw that I could still enjoy myself 9 her and wished she could be a part of it． I wrote Sally a letter to 0 she's always my best friend. I told her everyone had friends from home and friends from school, and all the friends were indeed life's greatest 11 ．Sally wrote me back soon. She was in agreement and felt sorry about 12 she had done． I think Sally and I both 13 an important lesson from it. Nothing can influence our 14_ and change the experiences we've shared．We are now walking on two different paths of life. While new friends are special and exciting, old friends are 15 there, waiting to share their heart, no matter how far away they are from each other．
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