问题
单项选择题
十进制数值87的二进制数值是
A) 1010111
B) 1001111
C) 1010101
D) 1001100
答案
参考答案：A
解析： 如果要把十进制整数转换为二进制整数，其规则是：除2取余，直到商为0为止，结果按照上右下左的排列方式列出，就是转换后的结果。
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十进制数值87的二进制数值是
A) 1010111
B) 1001111
C) 1010101
D) 1001100
参考答案：A
解析： 如果要把十进制整数转换为二进制整数，其规则是：除2取余，直到商为0为止，结果按照上右下左的排列方式列出，就是转换后的结果。
| 完型填空。 | |||
| Maria Comez was born in Peru. She grew up in a small village. She 1 when she was six years old.She went to elementary school, but she 2 to high school. Her family was very 3 , and she had to go to work when she was thirteen years old. She 4 in a shoe factory. When Maria was seventeen years old, her family 5 to the United States. Maria 6 in the United States, she was not happy. She missed her friends in Peru, and she didn't 7 a word of English. She began to study English at night, 8 worked in a factory during the day. Maria studied very hard, and now she speaks English well. She is still 9 at night, but now she is studying typing. She wants 10 in Peru. Maria still misses her friends in Peru. But she is very happy now, and she hopes she will have a good future in the new country. | |||
| ( )1. A. went to school ( )2. A. went ( )3. A. rich ( )4. A. works ( )5. A. moved ( )6. A. reached ( )7. A. tell ( )8. A. when ( )9. A. studying ( )10. A. to do | B. go to school B. didn't go B. poor B. is working B. go B. arrivel B. talk B. so B. studied B. do | C. goes to school C. began C. happy C. is going to work C. stayed C. got C. know C. or C. study C. tobe | D. begins school D. wasn't D. glad D. worked D. lived D. moved D. say D. and D. studies D. be |