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【单选题】
下面程序的功能是在字符串每个字符间插入一个空格。程序的运行结果如下：Input a string:Howareyou↙Insert results:H o w a r e y o u按要求在空白处填写适当的表达式或语句，使程序完整并符合题目要求。#includeA.
第19行：strcpy(t, s) 第20行：t[i]!='\0' 第22行：s[j] = t[i] 第24行：s[j] = ' '
B.
第19行：t=s; 第20行：t[i]!='\0' 第22行：s[i] = t[j] 第24行：s[j] = ' '
C.
第19行：strcpy(t, s) 第20行：t[i]='\0' 第22行：t[j] = s[i] 第24行：s[j] = '\0 '
D.
第19行：strcpy(s, t) 第20行：t[i]=='\0' 第22行：s[j] = t[i] 第24行：s[j] = '0 '
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【单选题】听力原文：W: One of her grades was 90, and another was 50. M: Her work is very uneven. What was the girl's low grade?
A.
140.
B.
50.
C.
90.
【单选题】听力原文：W: One of her grades was 90, and another was 50. M: Her work is very uneven. What was the girl's low grade?
A.
9.
B.
50.
C.
90.
【单选题】A:Are you satisfied with her work, sir? B:Not at all、It couldn't be any _______.
A.
better
B.
best
C.
worse
D.
worst
【单选题】She ________ on her work so much that she didn’t notice that a crowd of people had _______around her.
A.
focused; focused
B.
fixed; gathered
C.
concentrated; concentrated
D.
carried; collected
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