【判断题】【消耗次数：1】
∫1/x2 dx=1/x+C
①
正确
②
错误
参考答案：
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相关题目
【单选题】
有如下程序段：
int x1，x2;
char y1，y2;
scanf(%d%c%d%c，x1,y1,x2,
若要求x1、x2、y1、y2的值分别为10、20、A、B，正确的数据输入是（ ）。 （注：?代表空格）
①
10A20B
②
10?A20B
③
10?A?20?B
④
10A20?B
【单选题】
若X1, X2独立,且分布率为P(Xi= -1)=P(Xi= 1)= 1/2(i = 1,2),那么下列结论正确的是
①
X1=X2
②
P（X1=X2）=1
③
P（X1=X2）= 1/2
④
以上都不正确
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