有比较好的图片素材网站吧贴吧吗 容易发图片的

来源：蜘蛛抓取(WebSpider) 时间：2016-05-03 00:41 标签： 比较好的图片素材网站
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nginx error!
The page you are looking for is temporarily unavailable.
Please try again later.
Website Administrator
Something has triggered an error on your
This is the default error page for
nginx that is distributed with
It is located
/usr/share/nginx/html/50x.html
You should customize this error page for your own
site or edit the error_page directive in
the nginx configuration file
/etc/nginx/nginx.conf.哪个,我是把图发到贴吧里了就把答案发到知道里面吧好的话还有加分
玄岑总攻挪
第一道答案.A CH3CH(OH)COOHB CH3CH(OH)COOC2H5C CH3CH(OOCCH3)COOHD 2CH3CH(OH)COOH===CH3—CH—C=O
O=C——CH—CH3第二道答案.1
—[—CH2—CH—]—n
COOH2 消去反应
酯化反应3 C12H22O11+H2O==2C6H12O6
nCH2=CH(OH)COOC2H5==—[—CH2—CH—]—n
COOC2H54 醛基
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