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单选题 下列哪个行列式的值一定为零 ( )
A. 
B. 
C. 
D. 
学科：线性代数
时间：2026-05-30 14:44:42
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题目1单选题
下列哪项不属于队列研究的特点A. 设立对照组B. 属于观察法C. 能确证暴露和结局之间的因果关系D. 随机分组
题目2单选题
下列哪项不属于队列研究的目的A. 检验病因假设B. 评价预防效果C. 新药的上市后监测D. 描述疾病的分布
题目3判断题
暴露指研究对象接触过某种待研究的物质或具有某种研究的特征或行为A. 正确B. 错误
题目4判断题
队列是指有共同经历或有共同暴露特征的一组人群(如出生队列和暴露队列).根据其变化分为固定队列和动态队列A. 正确B. 错误
题目5判断题
队列研究根据研究对象是否暴露于某研究因素或其不同水平将研究对象分成暴露组与非暴露组A. 正确B. 错误
题目6单选题
<img src="https://tihai-oss-cloud.itihey.com/img/b4e8fca7d72dce4e386f32692b4a90f0.png"><img src="https://tihai-oss-cloud.itihey.com/img/3c5d0093538571ae84efa95e7e66b473.png"><img src="https://tihai-oss-cloud.itihey.com/img/88edadac3d610b6d34543c2e3bcedcf2.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/8e16fc1eaeb76783e8e5deba2430d53a.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/658eb05f326e018ffd991285429a57b1.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/bb83e705608b922b266587bfca9ee3fa.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/b2bb1cc42c44d497b5d6932687c0f6b8.png">
题目7单选题
<img src="https://tihai-oss-cloud.itihey.com/img/99db01a3a7465e179369dfb02cb3893d.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/3e0bea2e8e5801148b603f8b5a1d0cf4.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/601cf2d7af23686eee8a40bc0686ecfb.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/53000d39dade51957da09fc3f545a384.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/928cbaf817c86aa59994a75703358bef.png">
题目8单选题
<img src="https://tihai-oss-cloud.itihey.com/img/6f2e06756bca8391110280ac7b68d166.png"><img src="https://tihai-oss-cloud.itihey.com/img/95af7a60001d8f0f823b31794680771b.png"><img src="https://tihai-oss-cloud.itihey.com/img/11ea3b1c5d864e9f1b8ccf19224d5dee.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/74caf297eca2d774e7625698b51c1a88.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/ba5a4647ab5d30921e58fdbdf75b927e.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/8ee5aa7478a2b4eab2f1d7439bd947ac.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/35116b2792326fd98abf66c1899c04cd.png">
题目9单选题
六阶行列式中带负号的项是A. <img src="https://tihai-oss-cloud.itihey.com/img/a77f8f6f8349801005acd2bef690756e.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/4fa156fb2a90f7ec47b9afbdfceb0632.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/b5fa13481d14b1507d172612c2d5d914.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/190cd0f06f560600f752eb8652b3b0c4.png">
题目10单选题
下列哪个行列式的值一定为零 ( )A. <img src="https://tihai-oss-cloud.itihey.com/img/916e250e392e5dc4acd3aab628616df2.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/087edd11f309e19873c4cd252597f0d6.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/8dcfad38bf364ec658034d57357d1fcd.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/9e7188b0eac71cf91f25a33d1995bd00.png">
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