Click the Exhibit button. As a maintenance feature， you have created this servlet to allow you to upload and remove files on yourweb server. Unfortunately， while testing this servlet， you try to upload a file using an HTTP request and onthis servlet， the web container returns a 404 status. What is wrong with this servlet？（） ["HTTP does NOT support file upload operations.","The servlet constructor must NOT have any parameters.","The servlet needs a service method to dispatch the requests to the helper methods.","The doPut and doDelete methods do NOT map to the proper HTTP methods."]
胃液含的消化酶是（） ["淀粉酶","蛋白酶","ATP酶","脂肪酶"]
2014年6月，中国、哈萨克斯坦、吉尔吉斯斯坦联合申报的丝绸之路项目被列人世界遗产，这必将带动三国新一轮的经济发展和增进彼此的友好关系。中、哈、吉联合申遗的成功说明（）。 ["我国坚定地维护各国的核心利益","文化遗产是人类共同的文化财富","共同利益是国际关系的决定因素","文化可成为国家强大的物质力量"]
浅埋和深埋隧道的分界的计算是根据（）来确定的。 ["围岩类别","隧道横断面大小","埋深","隧道的施工因素"]
信息量巨大的网站一般采用的布局具有哪些特点（） ["采用规则型版式","图文率中以文字为主","稳定感大于自由感","图片多为出血"]
（）是以现实生活中的客观发展为基础。它来源于客观事物中不明显的或者可能存在的规律中。
