天竹的养殖需要选择肥沃，并且排水性良好的沙质土壤，夏季可每天浇水一次，冬季不必浇水太勤。春季可室外养殖，夏季遮阴，保持在24-26℃，生长期每月施肥一次，5开发者_StackOverflow月可施一些钾肥，生长期定时修剪
I have followed some tutorial that teach me how to view P开发者_高级运维DF file in UIWebView, however I found that if the file size is large, it will be lag when I zoom the PDF, but it doesn\'t occur
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