题目内容

有结构体类型声明如下：struct student{ int num; char name[20]; int score[3];} stu[10]={{1,"aaa",70,70,70},{2,"bbb",80,80,80},{3,"ccc",90,90,90}};要输出学号是2 的学生的姓名，则 printf("【1】", 【2】 );要计算某学生(stu[i])的总分：for (j=0,sum=0;j<3;j++)sum+= 【3】;

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1,2,3,4,5,6-环己六醇的所有异构体(包括顺反、旋光)共有几种?( )

A. 7
B. 8
C. 9
D. 10

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1,2-二甲基环丙烷有几个立体异构体?( )

A. 无立体异构体
B. 二个,一对对映体
C. 三个,一对对映体和一个内消旋体
D. 四个,二对对映体

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听力1I. Understanding Long ConversationsDirections: In this section you’ll hear a long conversation or conversations. Listen carefully and choose the best answer to the questions you hear.(5 points)1.[音频]

A. She forgot most of her English.
B. She returned to the regular class.
C. She missed her best friend a lot.
D. She became sad about her studies.

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2.

A. Because her English was very good.
Because she had been in the wrong class.
C. Because she wanted to study online.
D. Because she didn't like the regular class much.

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