【多选题】【消耗次数：1】
关于 HLA 的特性，下列哪些是正确的 ?
①
HLA I 类分子的β2m为非 HLA 基因编码产物
②
分析亲代与子代的 HLA表型可以进行亲子鉴定
③
HLA 分子与很多疾病相关
④
HLA 分子的肽结合区为肽链的多态性部位
⑤
HLA 分子是引起移植物排斥反应的抗原
参考答案：
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相关题目
【多选题】
HLA 的高度多态性显示何种意义 ?
①
是高等动物抵御不利环境因素的一种适应性表现
②
维持种属的生存与延续
③
在无亲缘关系人群中寻找配型合适的供体极为困难
④
在医学上作为代表个体特异性的遗传标记
⑤
与疾病相关的机制之一
随机题目
【判断题】
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ZH-CN;mso-bidi-language:AR-SA">零件图应通过剖视图和断面图表达内部结构，不应出现虚线
①
正确
②
错误
【单选题】
正投影法中，投影面、观察者、物体三者相对位置是( )
①
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人——面——物
②
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物——人——面
③
Normal
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2
false
false
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ZH-CN
X-NONE
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C. 人——物——面
④
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false
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面——人——物
【单选题】
当直线、平面与投影面平行时，该投影面上的投影具有( )
①
Normal
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积聚性
②
Normal
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false
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真实性
③
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类似收缩性
④
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收缩性
【单选题】
mso-bidi-font-family:宋体;mso-font-kerning:0pt;mso-ansi-language:EN-US;
mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA;mso-bidi-font-weight:bold">平行剖切面剖视图所用的剖切平面是
①
一个剖切平面
②
两个相交的剖切平面
③
两个剖切平面
④
几个平行的剖切平面
【单选题】
带切口三棱锥的三视图正确的是<img src="https://file.icve.com.cn/ssykt/612/1019/993FEC45F09DCEE161CBCB1E01C2CC55.png"/>
①
<img src="https://file.icve.com.cn/ssykt/182/242/2D93C9C0D7E7C1DB10E4A19FFB151032.png">
②
<img src="https://file.icve.com.cn/ssykt/806/563/C988CDCABF9549CBA1EF8D59C4196DAD.png">
③
<img src="https://file.icve.com.cn/ssykt/781/281/C344661011811700A3609B4D1742E2F6.png">
④
<img src="https://file.icve.com.cn/ssykt/469/867/757D8D6A89B8454C01577E33C252B1AA.png">