举一反三
- 已知指针p的指向如图所示的a[1]，则表达式++*p的值是（）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/ef6deef5093b4dd2bcbfc9c54627b95d.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" />
- 船A重P<sub>A</sub>，以速度 <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/1e6a475774084108a4d9ded2c70e6ca1.png" />航行。重P<sub>B</sub>的物体B以相对于船的速度<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/b39c5c7163f846e8bc34287ec16ef1a7.png" />空投到船上，<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/20f0fb6f6dbc40638b69c7a33e96fd41.png" />设与水平面成<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/3651093fa407458596d5b85ce9b1dc5d.png" />角，且与<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/14fe1be64d75470c8843680bac3209a7.png" />在同一铅直平面内。若不计水的阻力，则二者共同的水平速度为____________。<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9456cc95f694413584344f4bad82d008.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/910e6572478f418c97aa55ae3e71eb87.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/eb921b41a733425c811ac7b3848f3afe.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/06d430260f9c402eaf641a0ba96427c5.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/4c6f547166aa4497b9c6e8ff20fb5407.png" />
- 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" />
- 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" />
内容
- 0
下列积分中能用牛顿-莱布尼兹公式的是（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/379f5cddb00442c9b40088a96c1ffa37.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/5ba6eb575adc4b6e843f8da192b341eb.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/58ec1ed0be3f4cdead7cf900d12681fe.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/a4eab4fe9e9c4fe0b56a15f4678d5e06.png" />
- 1
已知 P （ A ） =0.8, P(A-B)=0.2, ， 则 P(B)= （ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201707/14c8674c34b54c5e8c466a4e310ba6ad.png
- 2
已知电路如图 4 所示，运算放大器构成http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/0547d1e3e7b44b5d8201447c92ed6e29.png
- 3
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" />
- 4
下列四种产品中，（）属于主体附加。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/7de8bb1790ee4eccbc8fe23d663cb293.JPG" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/9f76d9ce04cb4729b4739bdd64d5917b.JPG" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/b4d8b1ab0b9c4f5e8d165f7afd487e00.JPG" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/4862f4e33e114c63bcfa3ebf5c112cba.JPG" />