What effect does joblessness and cuts in public assistance have on children of single - parent families
Another 3 million of them live in poverty.
B. The number of them increased by about 20 percent in just three years.
C. The number of them increased by about 3 percent in the 1980s.
D. They were not affected at all.
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现有以下结构体说明和变量定义，如图所示，指针p、q、r分别指向一个链表中连续的三个节点。 struct node {char data； struct node*next;}*p,*q,*r； 现要将q和r所指节点交换前后位置，同时要保持链表的连续，以下不能完成此操作的语句是______。
A. q-＞next=r->next;p-＞next=r;r-＞next=q；
B. p-＞next=r;q-＞next=r-＞next;r-＞next=q；
C. q-＞next=r-＞next;r-＞next=q;p-＞next=r；
D. r-＞next=q；p-＞next=r;q-＞next=r->next；
According to the author, ______.
A. the personalities of athletes produce violent confrontations
B. athletes should not have to accept unnecessary physical abuse
C. athletes salaries are already too high
D. athletes need higher salaries to compensate for their injuries
中国证监会对各项风险控制指标设置预警标准，对于规定“不得低于”一定标准的风险控制指标，其预警标准是规定标准的120%；对于规定“不得超过”一定标准的风险控制指标，其预警标准是规定标准的( )。
A. 70%
B. 75%
C. 80%
D. 85%
设变量均已正确定义，若要通过scanf("%d%c%d%c",＆a1,＆c1,＆a2,＆c2)；语句为变量a1和a2赋数值10和20，为变量c1和c2赋字符X和Y。以下所示的输入形式正确的是(注：□代表空格字符)______。
A. 10□X□20□Y
B. 10□X20□Y
C. 10□X
D. 10X 20□Y 20Y
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