不能安全使用一个检验周期的气瓶和阀门应予报废
正确
暂无解析
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
You________gonow.It’sgettinglate.
About20ofthepassengerswhowereinjuredinaplanecrasharesaidtobein_____condition.
________,Johnhasbeentoseveralforeigncountries.
设矩阵则A与B()