A:
B:
C:
D:
举一反三
- 一定量的理想气体,在温度不变的条件下,当压强降低时,分子的平均碰撞频率<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5499a59dc3754bfdbf231e19c5e2edb9.png" />和平均自由程<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/bba421d6506c4072b583fd4e63b5df81.png" />的变化情况是( ): A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5499a59dc3754bfdbf231e19c5e2edb9.png" />和<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/bba421d6506c4072b583fd4e63b5df81.png" />都减小. B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5499a59dc3754bfdbf231e19c5e2edb9.png" />减小而<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/bba421d6506c4072b583fd4e63b5df81.png" />增大. C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5499a59dc3754bfdbf231e19c5e2edb9.png" />和<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/bba421d6506c4072b583fd4e63b5df81.png" />都增大. D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5499a59dc3754bfdbf231e19c5e2edb9.png" />增大而<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/bba421d6506c4072b583fd4e63b5df81.png" />减小.
- 在电感元件的交流电路中,已知<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/a818ffec501541eaacdc3fd4b3458bfa.png" />,则( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/70961d125a8a493cbdbd3169e8655336.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/65f4ae24f45041548b04d5bb8c113767.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/20d9ff741d534721b621dfe04fb3b2bd.png" />
- 要使<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/c4b80714c3b14a559ae5bdcd09ef1fc6.png"/>是线性方程组AX=0的基础解系,则只要系数矩阵A=( ). A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/fb16cbefa5a746599e585bcf30dce878.png"/> B: [2 1 1] C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/df5d7a834bd44f44a519eaffffd47d39.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/5adacc7663b444d69f148ab2e7a11cf1.png"/>
- 以下哪位是豫剧艺术家常香玉? A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/dbd637c9af83424994f9aea4e8abc44a.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/02974b0beb3f433db263c281964e9dc0.jpg" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/12b7c600479849858f1cbfa120d2c863.jpg" />
- 用强度为 I ,波长为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/2656b829b5014d2a9f4038990a94ef61.png" />的 X 射线分别照射锂( Z = 3)和铁(Z= 26)。若在同一散射角下测得康普顿散射的X射线波长分别为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/2de5dc6605c04faaabd9c723e2d3cead.png" /><img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/96a7971c647c444a88d04338cd33e5fe.png" />,它们对应的强度分别为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/ccd8dfd4a028462392802a58285139b1.png" />,则( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/9dee8d25d82d4a079c63bce2735e4c00.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/4a1eb9d8f57d4a02ab9fac923b14c0a6.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/c0b0e797479e4dfa985026ddc4b0513a.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/cab491c102954f4088c0b11cbb46fe02.png" />
内容
- 0
如图所示,圆形截面区域内存在着与截面相垂直的磁场,磁感应强度随时间变化.磁场区域外有一与圆形截面共面的矩形导体回路 <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/0eea13cd51b54af3b701a0035e6416fe.png" />,以<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/865048ee310d46e09b743d6cfc93fa4a.png" />表示在导体<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/55379797515a41b88e0dcb947c44b585.png" />段上产生的感生电动势, I 表示回路中的感应电流,则( )<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/95d31735160f47dcb4d8f5ac973c0ce8.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/986a62c34302465cad899f00080acc4f.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/4b6ab53aeebc4f92b722d8fff6237a87.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/d869de90826645c1b386e2019aa86be2.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/da8edb3a9af0442bb11dcee16f061375.png" />
- 1
设某微观粒子的相对论动量是它非相对论动量的<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/f04bc52895444aa9bf3ce69591507d4b.png" />倍,则其运动速度的大小为:( c 表示真空中的光速)( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/39876687533246689c09bf2af4be1fe2.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/dd046c8367ec4635b34aaad5ceffe48b.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/99f25f4748cf434c96c5fa7552098ff5.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/85033bc491434663a83ffea2611f0c2b.png" />
- 2
下面哪张图片是苏州弹词的表演形式? A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/ea10d729205b47d38658fe913b6a664d.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/383680ea91e34e8fa3e77b2a65902fb6.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/a194644174af463e99e14749f7e471bd.png" />
- 3
如图所示的一细螺绕环,它由表面绝缘的导线在铁环上密绕而成,每厘米绕10匝.当导线中的电流I 为2.0 A时,测得铁环内的磁感应强度的大小 B 为1.0 T,则可求得铁环的相对磁导率<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/c31a3f1826e440f79e7fb4077c8b5656.png" />为(真空磁导率<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/6323a02b04c04433b348982bca792a04.png" />)( )<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/21646345be094027b95dfa1075514903.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/d61b3d6b1b664ff7a7271955ea8cb90c.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/8599397fd0ad4c8a8ce382fc6eda4fd4.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/092b8a5debaa47f899b9745dba2a6492.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/6647d96f362c41879bd44d76722c7092.png" />
- 4
设高温热源的热力学温度是低温热源的热力学温度的 n 倍,则理想气体在一次卡诺循环中,传给低温热源的热量是从高温热源吸取热量的( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/571444ded5964cc399f8d1257d836bc4.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/46f60945452f473e8021d1e64f9b64f3.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/3d0016b4761a428c9864975887ccfa00.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201804/c7de33d01cb5430583b2618104f18b4c.png" />