A、<img width="25" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/c78e69ff-4836-4d18-8b48-8e6036ebe17d.png">
B、<img width="25" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/913be6b0-29c5-4d7c-84ed-f608998d0cd4.png">
C、<img width="13" height="37" id="图片 168" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/b717ed49-b0bb-4e8e-a031-5cdf1fabbee2.png" alt="说明:wps_clip_image-22993">
D、<img width="13" height="36" id="图片 167" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-01/774cfeba-980f-419e-b8ff-a1e587adbfb1.png" alt="说明:wps_clip_image-30508">
A、<img width="25" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/d7ab69cb-2e96-4a09-a08b-6c75da634a09.png">
B、<img width="25" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/06e7aa5a-6043-4609-be74-e9df96cf4aa4.png">
C、<img width="13" height="37" id="图片 168" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/42a542ce-a874-4af9-ba90-b17723f7ff40.png" alt="说明:wps_clip_image-22993">
D、<img width="13" height="36" id="图片 167" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-08-09/0fae3b47-b800-4c3e-9f82-4abc906d6ffa.png" alt="说明:wps_clip_image-30508">
A、<img width="25" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/d54cb159-7869-40c3-86bb-32bbc8d0a007.png">
B、<img width="25" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/e511f219-48ad-4aef-9faa-f43bda7ab61b.png">
C、<img width="13" height="37" id="图片 152" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/50d1daf0-e7dd-4638-abed-47fabdc8026d.png" alt="说明:wps_clip_image-22993">
D、<img width="13" height="36" id="图片 151" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/8920b84b-5d0f-4015-a5a4-ada512b885fb.png" alt="说明:wps_clip_image-30508">
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试题解析
由两条已知直线互相垂直可得1×2+3×a=0,得
.