举一反三
- 某放大电路如图所示。设VCC>>UBE，ICEO≈0，则在静态时该三极管处于（）。
- 中国大学MOOC: 某放大电路如图所示。设VCC>>UBE，ICEO≈0，则在静态时该三极管处于（）。
- 图示单元体应力状态，沿x方向的线应变εx可表示为（ ）。 <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9fdd7efe625f4047bb61ef38f5aea871.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/5da2d36f7ef84cbc8396b1e27b775bf4.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/164a3d85fdb6462696d83d62b92b2435.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9e37e58e1c12442e8e018c0af637dfdf.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/41fd81417e5f47bea1db35fed7c2c44e.png" />
- 在对称循环的交弯应力作用下，构件的持久极限为（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/5e3cddf9e66643319bf5ff705bc3861b.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/ee22a4a0f41b4cdba536aa142d522b47.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/c75dd41c5a4242c78b0846e38ac11a4a.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/689e0f4d28a044c2839b35cd76770a3b.png" />
- 拉普拉斯（Laplace）方程的表达式为（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/26731bcad75f41389448b29292940653.jpg" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/40e7e55a72ee44f59b45d20c84ebe3a6.jpg" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/c65a79ea4d754174b99f34020d6e1735.jpg" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/139e8d3dc37941549e7b6b1731243172.jpg" />
内容
- 0
在绘制程序流程图时，表示“条件判断”的符号是【 】 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/999737d003564abda13a025e003fda97.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/e471e08876184d45939dd8639058a382.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9a703316d25940e4b089eb336deaa0da.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/202e22615902455e95ca7025184f1c62.png" />
- 1
在绘制程序流程图时，表示“处理框”的符号是【 】 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/a509700eef8e40de85dfb899b3d8a498.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9189fd85ff654caab759023622837479.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/0f3918887aaa4f6ea7b49b69cc0d91cb.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/02b3e862bd1243e0a4abd511ea96bab7.png" />
- 2
放大电路如图9所示， RF的反馈类型是（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/a7749521401a464cb60fcd5a83682f6a.png
- 3
平面一维稳定渗流的压力分布公式为（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/d08348f3b84f442d87994311dc13686b.jpg" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/2df214c86c5e4103897ba81ce2c6cd98.jpg" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/cc98e4a778cc463c965ac8115e028f86.jpg" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/bc82177c19d44acfa1b365c3d66ed0a4.jpg" />
- 4
在横截面积等其他条件均相同的条件下，压杆采用（）所示的截面形状，其稳定性最好。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/cde5a8d5534f40b890e9156e7f05ea94.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/41e79439d2fd46fca429c2663fe0bbca.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/af2d8363d9be44bd8dc3f3e96310748b.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/d427ec9070724523b4f4d924c2a2daf0.png" />