下图电路中，Is=0时，I=2A，则当Is=8A时，I为___ 安。（ ）https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/f2adbf969c284ffc943a62379d1f8f99.jpeg
举一反三
- 图示电路中电流 I 的大小为：（ ）。https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/36cb21215e614db9b5b0c39f18ca5145.jpeg
- 下图电路ab端的等效电阻为____Ω（）<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/467e7c93e1bf491582e0a57566fa878e.png" > A: 1.2 B: 1 C: 2 D: 0.4
- 电路如图所示，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202102/31c88e903dbc43c5874a6f93659c4b11.png" />已知Us=2V时，I=1A，则当Us=4V时，I=2A。 （ ）
- 比较两个一位二进制数A和B,当A=B时输出F=1,则F的表达式是（ ）。 A: F=A⊙B B: F=AB C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/92cca51ed8dd46e98c023da4ed4a3710.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/63fb5e7770cb421fafe5b574023a5bf9.png" />
- 为使锅垢中难溶于酸的CaSO4转化为易溶于酸的CaCO3，常用Na2CO3处理，反应式为CaSO4+CO32-<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/88320eab77594b6abf0039ab0efe3c57.png" />CaCO3+SO42-，此反应的标准平衡常数为（）。 A: K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaSO4)·K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaCO3) B: K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaCO3)/K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaSO4) C: [K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaSO4)·K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaCO3)]1/2 D: K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaSO4)/K<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/201911/e8c371ce6b96487e829331bb8dee134f.png" />(CaCO3)