经过显著性检验而被拒绝的假设（ ）。
A: 一定是错误的
B: 可能正确，但决策错误的概率是显著性水平
C: 一定是正确的
D: 可能不正确，但决策犯错误的概率是显著性水平
A: 一定是错误的
B: 可能正确，但决策错误的概率是显著性水平
C: 一定是正确的
D: 可能不正确，但决策犯错误的概率是显著性水平
举一反三
- 剖视图正确的画法是 。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/9537d515da014e68a3d3cb450f99ad38.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/1a23c24f84774377874f0c38fd153a7e.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/f5954dedb8bd4b788a4a43c7a11266a7.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/bd015ac5086848d3876260b7aaf6bfc5.png">
- 下列各表达式正确的是（）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/c00e74606aff46b3bd686c1cbb405da6.gif" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/a9452605ec5b4dfc8fede5ae6baae903.gif" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/316677d9b4fe41d09b0ef5f8b18e4a0b.gif" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/1d4a5808f5524820897bf23dd439ad0c.gif" />
- 下列命名正确的是( ) A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/45d758d675564df2b279142c14ae9e2e.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/4889492bf6634f04b7c4e5c944f66ed8.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/70bc128530144f07aa006af0ebe6a989.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/ddcdceddcb9a49bf8ab24aea015a7a9a.png">
- 以下哪个（些）算符一定为厄米算符 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/2f5ca50e517a4dee9c70e7680c968566.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/cc1685bf62da473b9d04e5d624dadb6e.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/6ad8cf39a6e04652b38899df7ff47e62.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/be241a76c49a4f66b4c28e4b6d1439e1.png" />
- 钢筋混凝土受弯构件挠度计算公式正确的是 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/5dfa77cda9e747b8af86ccfbcedabe3d.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/78b101c10ca74e3089cf834692b27a96.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/90cc6358cb3a4235989506422e0b8e2c.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/94b38aa9276b4dd38d5a2f4d24fae72a.png" />