首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
After inv estimating five residential gas explosions that killed four people in the Kansas City--Topeka area in 1988 and 1989, t
After inv estimating five residential gas explosions that killed four people in the Kansas City--Topeka area in 1988 and 1989, t
admin
2014-03-21
54
问题
After inv estimating five residential gas explosions that killed four people in the Kansas City--Topeka area in 1988 and 1989, the National Transport action Safety Board has【C1】______ that automatic shut -off valves be required when home gas lines are installed or 【C2】______ The valves stop 【C3】 ______ and potentially【C4】______ surges in gas flow, such as would occur 【C5】______ a contractor hit and ruptured a pipe.
The NTSB labeled the report" urgent",【C6】______ it doesn’t rate the risk
of surges high enough to ten consumers to【C7】______ $ t000 or so to dig up old lines and【C8】______ the $15 to $20 valve. A bigger【C9】______ to homeowners, says the NTSB, is the danger of slow 【C10】______ from pipe cur rosin,【C11】______ the valve would not prevent. Symptoms of a possible gas【C12】______ under your property include a sulfur smell and brown spots or dead【C13】______ in your yard. Call your gas company【C14】______ two of the Kansas City-area explosions【C15】______ had gas odors been【C16】______ And before【C17】______ start construction in your 【C18】______ , ask your gas company to【C19】______ mark the position of pipes【C20】______ your house.
【C5】
选项
A、if
B、when
C、as
D、since
答案
A
解析
根据语法,此句为虚拟语气,故应填A if。
转载请注明原文地址:https://kaotiyun.com/show/BHUK777K
0
专业英语四级
相关试题推荐
Mostpeoplewhogoonlinehavemainlypositiveexperience.But,(1)______anyendeavor—traveling,cooking,orattendingschool—th
Mostpeoplewhogoonlinehavemainlypositiveexperience.But,(1)______anyendeavor—traveling,cooking,orattendingschool—th
Mostpeoplewhogoonlinehavemainlypositiveexperience.But,(1)______anyendeavor—traveling,cooking,orattendingschool—th
Mostpeoplewhogoonlinehavemainlypositiveexperience.But,(1)______anyendeavor—traveling,cooking,orattendingschool—th
Womendriversaremorelikelytobeinvolvedinanaccident,accordingtoscientists.Researchers(1)______6.5millioncarc
HarrietBeecherStowewasraisedinaPuritantraditionofhighmoralstandard.HerfatherLymanBeecherwasaCongregationalMi
Morethantwenty-ninethousandforeignexchangestudentsattendedAmericanhighschoolslastyear.TheStateDepartmentsaysthe
EveryoneexceptTomandJohn______therewhenthemeetingbegan.
Janewishesthatshe______foreigntradeinsteadofliteraturewhenshewasincollege.
Alltheroomsonthesecondfloorhavenicely______carpets,whichareincludedinthepriceofthehouse.(2004年考试真题)
随机试题
由于含糖饮料的卡路里含量高,容易导致肥胖,因此无糖饮料开始流行。经过一段时期的调查,李教授认为:无糖饮料尽管卡路里含量低,但不意味着它不会导致体重增加。因为无糖饮料可能导致人们对于甜食的高度偏爱,这意味着可能食用更多的含糖类食物。而且无糖饮料几乎没什么营养
急性胰腺炎时,参与胰腺组织损伤的炎性介质是
混合痔是指
患者,男性,66岁。下腹部疼痛12小时,伴发热6小时。患者14小时前因大便干、排便困难曾用“筷子”协助排便。12小时前开始出现下腹部疼痛,为持续性逐渐加重,不伴恶心、呕吐,无明显放射痛。6小时前出现发热,体温39℃,伴寒战。自发病来无排气排便。入院查体:急
表示X线管热容量的符号是
工程建设国家标准制定程序分为四个阶段,下列不属于该四个阶段的是()
由国际邮件互换局直分到邮局营业厅的邮寄物,由邮局通知收件人限期到检验检疫机构办理检疫手续。
与独资企业及普通合伙企业相比,下列各项中,属于公司制企业特点的有()。
定义:①自我意识:指一个人对自己的认识和评价,包括对自己心理倾向、个性心理特征和心理过程的认识与评价。②原意识:指由动物(特指猿群)进化而来的适合人类个体生存的基本感知。③显层意识:指个体在人类群体(社会)中受到教育的感知结果。典型例证:(1)尊
1962年,美国女作家雷切尔·卡尔森出版《寂静的春天》,引起对
最新回复
(
0
)