A:
B:
C:
D:
举一反三
- 可与2,4-二硝基苯肼反应生成黄色沉淀的是( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/bae956a55a934e888b1cabe17e68e866.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/a55be6cad4544a7198346aa1b73398f6.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/7f2334ba5b494271a31027c8f734ee66.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/7dd29a85700641d8baf1a329c5e5b142.png" />
- 可与硝酸银的氨溶液反应生成银镜的化合物是( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/6a4e97024646472bb00be0e30040fa7c.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/53a4027453494ea8bedecacc8f6bb12e.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/e0e31fd6b42c4587a95d288fc45a80cc.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/6ac884327101413198fd997428cc1e27.png" />
- 下列化合物能形成分子内氢键的是 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/017aef1f5b214562b278a4b8e8384bc8.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/4afb87421d00455c9abbef7de2b4e84c.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/acc0e72b43be45d4ad8cabfc177f4ce3.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/8b72d0c501fa45609fc24fc005dc6957.png" />
- 下列化合物不能使三氯化铁溶液显色的是( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/d6b1fbe3db92427fb17e6b03441b6314.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/1b39ba90bd784dd4a28af61dec53ee0e.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/bf8365034036486683b612acacc3ed1f.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/8af48ec2142d47e38eaf279ac191eafb.png" />
- 下列化合物发生亲核取代反应活性最大的是( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/e57c2689c7984597b020823c3c17cfe0.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/4604e9b1bf004c36a84068fbd00db8e5.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/4205ea439468429282bf518c0dcbb095.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/f8810518b81d448b8a178c5189e7f3e1.png" />
内容
- 0
2g氢气与2g氦气分别装在两个容积相同的封闭容器内,温度也相同。(氢气视为刚性双原子分子)。求:(1)氢分子与氦分子的平均平动动能之比;(2)氢气与氦气压强之比。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/a534e45a19e44cb5b635addbc32724c2.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/5fafd6ca27be4fd79ef0df46c041a0bd.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/ba4c959a181040bab18b9bfe72e6ecb1.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201712/3189a9bc704b440a88b3b2bade9ff800.png">
- 1
<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/2205d9f03e724a04b34f2f1045309079.png" />的幅频响应是,幅频响应是。 A: 1,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/760d7fcc2f264ed1b10fb836cb48f565.png" /> B: -1,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/21f685d2962e4b6993bfcaa513bdbf68.png" /> C: 2,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/57267e995f86426899ce3cc0177a2343.png" /> D: 1,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/ea8ba62853a94a15a5620c5165e3594a.png" />
- 2
逻辑函数F(A,B,C)=AB+BC+AC的卡诺图为( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/7a8254757f8a4fc6ab82fa93a8e86ebf.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/229cbcade3654fb99c66a7c102ec046f.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/1c851f1288be499c92d2a7b40607bd1a.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/3b385269839a45df9645db71096c2e81.png" />
- 3
若x2+y2=1,则dy为( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/d045b5f235a54083ab91e6f717cf00d8.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/74173c5355234874ab8cb9275865d5d6.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/bbfb37ba58fc4de0aa8688e0bb53cef5.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201905/f9a206c25e8c4ea1bd7b51519afd76b7.png" />
- 4
设<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/bed4f91f4fec44358e1cad3163fc6b90.png" />是在区间<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/a58a11f71a434f2ab38a2f347802f010.png" />上的<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/a392447e03794318affaa2b03bb5967b.png" />的分段线性插值函数,以下条件不是<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/c00fe77a8291453a8cb2577eb68735ad.png" />必须满足的条件是________________. A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/cf6e811a4488413fae8f1839e4d098ea.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/bb93b2d7d02245878ec51e2986c97b5d.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/ec6692c00c2e49b6adbf9b0493638b81.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/214f277da4154f58a43751f80b09d959.png" />