怎们插入下拉列表?

[[{"txt": "\u5728\u5236\u4f5cexcle\u8868\u683c\u65f6\uff0c\u600e\u4eec\u63d2\u5165\u4e0b\u62c9\u83dc\u5355\u4ee5\u4f9b\u9009\u62e9\u5462\uff1f"}], [{"txt": ["\u5de5\u5177/\u539f\u6599"]}, {"txt": "\u7535\u8111\u4e00\u53f0"}], [{"txt": ["\u65b9\u6cd5/\u6b65\u9aa4"]}, {"txt": "\u65b0\u5efa\u4e00\u4e2a\u8868\u683c\uff0c\u6253\u5f00\u6240\u9700\u5185\u5bb9\uff0c\u9009\u4e2d\u8981\u5efa\u7acb\u4e0b\u62c9\u83dc\u5355\u7684\u5355\u5143\u683c"}, {"img": ["https://exp-picture.cdn.bcebos.com/94af5fc1b727ac53e4f28a9f2ecadce8914899cd.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u70b9\u51fb\u6570\u636e\u4e0b\u65b9\u7684\u63d2\u5165\u4e0b\u62c9\u5217\u8868"}, {"img": ["https://exp-picture.cdn.bcebos.com/dda98e4800fc77f771744493c8715fdb372090cd.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u8f93\u5165\u6211\u4eec\u4e0b\u62c9\u5217\u8868\u91cc\u9700\u8981\u663e\u793a\u7684\u4fe1\u606f\uff0c\u70b9\u51fb\u786e\u5b9a"}, {"img": ["https://exp-picture.cdn.bcebos.com/5e615d715fdb36205740d63aabc5260f89358dcd.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u6b64\u65f6\uff0c\u53ef\u4ee5\u770b\u5230\u5355\u5143\u683c\u91cc\u5df2\u7ecf\u6709\u5411\u4e0b\u7684\u5c0f\u7bad\u5934\u4f9b\u9009\u62e9\u4e86\uff0c\u6309\u7167\u521a\u624d\u7684\u6b65\u9aa4\u7ee7\u7eed\u6dfb\u52a0\uff0c\u70b9\u51fb\u5bf9\u8bdd\u6846\u4e2d\u7684+\u7ee7\u7eed\u6dfb\u52a0\u5185\u5bb9\uff0c\u70b9\u51fb\u786e\u5b9a"}, {"img": ["https://exp-picture.cdn.bcebos.com/423041db3620b93a22f33b76ad0f8835dc8a8acd.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u5f85\u6240\u6709\u5185\u5bb9\u90fd\u6dfb\u52a0\u5b8c\u540e\uff0c\u6211\u4eec\u4fbf\u53ef\u4ee5\u4ece\u4e0b\u62c9\u83dc\u5355\u9009\u62e9\u4e86"}, {"img": ["https://exp-picture.cdn.bcebos.com/ccc83ec5260f88352ef0426dce078801397086cd.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}, {"txt": "\u5982\u679c\u4e0d\u9700\u8981\u54ea\u4e00\u9879\uff0c\u53ef\u4ee5\u7ee7\u7eed\u70b9\u51fb\u6570\u636e\u4e0b\u65b9\u7684\u63d2\u5165\u4e0b\u62c9\u5217\u8868\uff0c\u9009\u4e2d\u9519\u8bef\u7684\u4e00\u680f\u540e\uff0c\u70b9\u51fb\u91cc\u9762\u7684\u7ea2\u8272\u2718\u5c31\u53ef\u4ee5\u53bb\u6389"}, {"txt": "\u5982\u679c\u5185\u5bb9\u662f\u5728\u5176\u5b83\u5355\u5143\u683c\u91cc\u5305\u542b\u7684\uff0c\u8fd8\u53ef\u4ee5\u9009\u62e9\u4ece\u5355\u5143\u683c\u9009\u62e9\u4e0b\u62c9\u9009\u9879\uff0c\u53ea\u9700\u70b9\u51fb\u540e\u9762\u7684\u5c0f\u65b9\u6846\u9009\u53d6\u5373\u53ef\uff0c\u53ef\u4ee5\u7701\u53bb\u5927\u91cf\u65f6\u95f4\u548c\u7cbe\u529b"}, {"img": ["https://exp-picture.cdn.bcebos.com/8974c38a59de45077e7b23c35e413a8ca70885cd.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}]]