下列结构中属于缩氨脲的是
未知类型：{'options': ['CH3CH=NNH2', 'CH3CH2CH=NH', '[img src="http://nos.netease.com/edu-image/6ef6e7b7cbc14ea98fd013b91bb14645.gif"]', '[img src="http://nos.netease.com/edu-image/c79e510227fa49bdb0a94c0c0372bfda.gif"]'], 'type': 102}
未知类型：{'options': ['CH3CH=NNH2', 'CH3CH2CH=NH', '[img src="http://nos.netease.com/edu-image/6ef6e7b7cbc14ea98fd013b91bb14645.gif"]', '[img src="http://nos.netease.com/edu-image/c79e510227fa49bdb0a94c0c0372bfda.gif"]'], 'type': 102}
举一反三
- 完成反应[img src="http://nos.netease.com/edu-image/cdd304ce2b3441dc957c95dc97f8ebbf.gif"] 未知类型：{'options': ['[img src="http://nos.netease.com/edu-image/cde7e0ce62c347789314cc3c6102269d.gif"]', '[img src="http://nos.netease.com/edu-image/ba72b1e4f37e4f9ba2135b9594a37d66.gif"]', '[img src="http://nos.netease.com/edu-image/91c10f2fa69045eb8ee9e764f7ecb315.gif"]', '[img src="http://nos.netease.com/edu-image/ab1b998771134fa8b3861a4b6ce42a6d.gif"]'], 'type': 102}
- 以下式子正确的是（） 未知类型：{'options': ['[img src="http://nos.netease.com/edu-image/87c3ef75-3379-4a70-8654-496142550ecd.png"]', '[img src="http://nos.netease.com/edu-image/9f3b2dd1-e17d-4e09-ac0a-836502646b81.png"]', '[img src="http://nos.netease.com/edu-image/9ce22ad2-1ce9-4df4-b637-2da4b0dff855.png"]', '[img src="http://nos.netease.com/edu-image/2b29fb55-86bd-4b0f-ac5d-95eb75579faa.png"]'], 'type': 102}
- 以下式子正确的是（） 未知类型：{'options': ['[img src="http://nos.netease.com/edu-image/26d309e1-0be4-46b1-967f-42e57d148314.png"]', '[img src="http://nos.netease.com/edu-image/1f04cafd-f0f3-484b-8b61-7d363ce1cbc9.png"]', '[img src="http://nos.netease.com/edu-image/0674b51a-37b7-4dca-b52f-29da9143c2b2.png"]', '[img src="http://nos.netease.com/edu-image/1a79c9f3-992d-4f8a-8185-2a5e096187b6.png"]'], 'type': 102}
- 决定系数的取值范围是 未知类型：{'options': ['[img src="http://nos.netease.com/edu-image/eded19be2e2e46f4b2083c62d49b2178.png"]', '[img src="http://nos.netease.com/edu-image/a048ef2be3ca4913a23a3dd87ede095d.png"]', '[img src="http://nos.netease.com/edu-image/0c48b616d8cb444a9c9e76307004af0f.png"]', '[img src="http://nos.netease.com/edu-image/46d254e274774d8487574daf191bd271.png"]'], 'type': 102}
- 下列关于传播常数与传输线原参数关系的描述，正确的是( ) 未知类型：{'options': ['[img src="//nos.netease.com/edu-image/0cd5632c-3308-495c-b0df-491b3f432dad.bmp"]', '[img src="//nos.netease.com/edu-image/d1e07e68-7f36-47e9-aa39-b652c08b89de.bmp"]', '[img src="//nos.netease.com/edu-image/8e721bd1-2d6b-4bcd-975a-c4cf396d7fe9.bmp"]', '[img src="//nos.netease.com/edu-image/342ddf2a-b990-49ae-be40-5cd6474c788d.bmp"]'], 'type': 102}