题目内容
汇款人对已汇出的款项申请撤销的行为称为汇兑的撤销。()
查看答案
搜索结果不匹配？点我反馈
更多问题
听力原文： Have you ever encountered a system breakdown because of a computer crash？ It may have started from a single Infectious file which runs through every computer in the world. And such a nasty computer virus is known to freeze the main operating system temporarily and hide within it to reproduce itself into a bigger infection, resulting in file deletion.
You should then subscribe to our anti-virus service, which provides 24-hour, worry-free protection through on and off line scanning. It has an automatic update function which can be done even during virus outbreaks. Our program will safely isolate and neutralize any infected files and restore lost files. Our online service also includes chat-based support from our certified technicians 24 hours a day. There are several system requirements on your computer however. Any interested customers must be using a computer with a 486 or higher processor and have at least 256 megabytes of RAM. Windows XP is preferred but not required. A one-year subscription costs only $49.99, so don't delay! We urge you to protect your computer as new and more powerful virus threats appear constantly.
7 What is being advertised？
墙梁除应符合本规范和现行国家标准《混凝土结构设计规范》(GB50010—2002)的有关构造规定外,承重墙梁的块体强度等级尚不应低于以下何值？()
【C17】
为防止或减轻混凝土砌块房屋顶层两端和底层第一、第二开间门窗洞处的裂缝,以下哪些措施有效？()Ⅰ/在门窗洞口两侧不少于一个孔洞中设置不小于1(12钢筋,钢筋应在楼层圈梁或基础锚固,并采用不低于C20灌孔混凝土灌实;Ⅱ/在门窗洞口两边的墙体的水平灰缝中,设置长度不小于900mm、竖向间距为400mm的2(4焊接钢筋网片;Ⅲ/在顶层和底层设置通长钢筋混凝土窗台梁,窗台梁的高度宜为块高的模数,纵筋不少于4(10、箍筋(6200,C20混凝土;Ⅳ/在底层的窗台下墙体灰缝内设置3道焊接钢筋网片或2(6钢筋,并伸入两边窗间墙内不小于600mm;
微信支付 
支付宝支付