[单选题] 反复开关后,截止阀仍内漏的第一处理办法是()。
A.加堵盲板
B.更换后报废
C.阀门换型
D.修理阀芯阀座

在我国主要企业液压挖掘机销售统计中，在3月份4379台销量中，按机型分析，15吨级 276台(上月为135台)，20吨级2025台(1082台)，22吨级1777台(973台)，25吨级65台 (37台)，30吨级213台(117台)，35吨级11台(11台)，40吨级12台(4台)。各吨级销量 (除35吨级外)几乎比上月增加一倍。按企业统计，常州现代1007台占23.0%，大宇重工烟台862台占19.7%，小松山推777台占17.7%，合肥日立699台占16.0%，CATERPILLAR489台占11.2%，成都神钢346台占7.9%，北京现代京城工程机械有限公司96台占2.2%，小松常州32台占0.7%。按地区分析，我国江苏、浙江、山东和安徽四省分别销量为1050、527、459和325台，四省合计销量2361台，占总销量53.92%，其中江苏省当月销量突破千台。西部地区销量783台，占当月销量17.88%，特别是云南、新疆和四川省月销量突破百台，分别是141台、140台和104台，其次是重庆，广西、陕西和青海省，分别为77台、67台、64台和51台，销量增加。西部地区各省区当月销量均比上月有所增加。东北辽、吉、黑三省合计134台占3. 06%，分别为94台、20台、20台，销量有所增加。中部地区湖北140台，河南120台，江西110台，销量较高。四个直辖市中以上海市和北京市销量最高为289台和127台，其次重庆77台，天津市15台，合计508台占11.60%。当月出口3台。

An increasing number of single women are buying their own homes, according to industry experts. By contrast, the figures for unmarried men buying houses or apartments show no increase. What is behind this trend I put the question to analysts at the Real Estate Institute, who came up with the following observations:
●Women no longer seek marriage and a homemaking role as their first priority, but want a stable job or career instead, and this puts them in a position where they can own a home independently.
●Single men are no longer pressured to "settle down," which traditionally means getting a stable job with a career path and then getting married and buying a house. They tend, therefore, to be less likely to have stable jobs.
●Women are increasingly better qualified and in many areas have surpassed men. This enables them to obtain better and more highly pai
A. Men are beginning to show an interest in the real estate market
B. Men will reclaim the positions they lost to women
C. Women will continue to invest in homes
D. Women will resort to marriage for emotional security