题目内容：
已知直线Y一3J，+1与直线z+my+1—0互相垂直，则m的值是
A．1/3 B．-1/3
C．-3
D．3
参考答案：
答案解析：
单选题：已知直线Y一3J，+1与直线z+my+1—0互相垂直，则m的值是
- 题目分类：文科数学
- 题目类型：单选题
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B．-1/3
C．-3
D．3
B．-1/3
C．-3
D．3
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椭圆的长轴是短轴的二倍，则椭圆的离心率是 A．1/2 B． C． D．
The baby seemed to be__________at the sight of the TV set.(
The baby seemed to be__________at the sight of the TV set.( )A．excited B．surpris
( ) The story was said to have been based on the information
( ) The story was said to have been based on the information from a reliable____
In the article, the author says a little about __________ (
In the article, the author says a little about __________ ( )A．black--market fur
In 1939 two brothers, Mac and Dick McDonald, started a drive
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