【单选题】【消耗次数：1】
艾滋病不会通过下列哪种途径传播？
①
蚊虫叮咬
②
输血
③
男男性行为
④
男女性行为
⑤
母婴传播
参考答案：
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①
全不非负
②
不全为零
③
全不为零
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【单选题】
独立方程<imgwidth="150"height="58"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image114.png">则基础解系为（）
①
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②
<imgwidth="82"height="154"v:shapes="_x0000_i1120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image118.png">
③
<imgwidth="82"height="154"v:shapes="_x0000_i1121"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image120.png">
④
<imgwidth="68"height="154"v:shapes="_x0000_i1122"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image122.png">
【单选题】
<imgwidth="409"height="37"v:shapes="图片_x0020_36"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image035.png">
①
<imgwidth="42"height="33"v:shapes="图片_x0020_37"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image036.png">
②
<imgwidth="49"height="43"v:shapes="图片_x0020_38"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image037.png">
③
<imgwidth="51"height="32"v:shapes="图片_x0020_39"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image038.png">
④
<imgwidth="81"height="38"v:shapes="图片_x0020_40"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image039.png">
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设向量组<imgwidth="126"height="28"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image136.png">的秩为<imgwidth="14"height="14"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">，且<imgwidth="46"height="16"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image140.png">，则以下结论中正确的是（）
①
<imgwidth="26"height="28"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中必有<imgwidth="14"height="14"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量线性无关，且<imgwidth="26"height="28"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="36"height="18"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image142.png">个向量都线性相关
②
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③
<imgwidth="26"height="28"v:shapes="_x0000_i1122"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="14"height="14"v:shapes="_x0000_i1123"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量都是<imgwidth="26"height="28"v:shapes="_x0000_i1124"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">的最大无关组
④
<imgwidth="26"height="28"v:shapes="_x0000_i1125"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image143.png">中任意一个向量都可由该组中其他任意<imgwidth="14"height="14"v:shapes="_x0000_i1126"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image144.png">个向量线性表示
【单选题】
<imgwidth="487"height="37"v:shapes="图片_x0020_162"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image168.png">
①
0
②
1
③
2
④
3
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<imgwidth="254"height="27"v:shapes="图片_x0020_196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image195.png">
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②
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<imgwidth="237"height="34"v:shapes="图片_x0020_117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image115.png">
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<imgwidth="66"height="25"v:shapes="图片_x0020_118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image116.png">
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0
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1
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0.3
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0.6
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