下列函数中为奇函数的是( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/7d0e4f5547744249b8c4c0e6db0e62fc.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/d19abeb7724248dca0a0c1b8017897db.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/3f5cff0b4a9b441da3b9e75bd446c141.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/d59a9db29be640a899356a3f1645a0dd.png">

设http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/90c19a717ac34717836dbca4afba1bd9.png是由方程http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/7648e783c2f24044bb84346d0e07e161.png确定，求http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/d24ed3aef9a94d38965289947da528f7.png（&nbsp; &nbsp; &nbsp;）

设积分区域D由http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/0c9ae1ed54164a58bd49dd327b8b9613.png和http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/106bacc400de4a258c3c2cc1e88f5e50.png围成，则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/533bf3bfe8d7439fbe2689a974be1cf1.png（&nbsp; &nbsp; ）<br>

下列化合物能发生Hoffmann重排反应的是（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/48290165247643e1aac1067c27f0cfce.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/04103b28f4ec4c5f8d28d8f8392e143f.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/80cb1b0a7023476496199ba53a5f28f3.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/72d151e6a82943c6b11abdffa60b68c0.png" />

下列化合物中不能发生碘仿反应的是( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/0dff63271c6c4de9b7f03cb96261c5dc.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/4abfad75020f40f89720a58429a59426.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/a2517651d2ba48e5be59131fd9e30a4f.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/4fa29dce98f542d883f395cefd3908df.png" />