设备就位后,应采用安装焊柱或焊接方式固定,必须在就位后立刻焊接牢固。
参考答案:对
. —What are you worrying about?
—It is ________ there is any chance of being infected by AH1N1 virus.
A.why
B.that
C.if
D.whether
据《素问·五藏别论》六腑的功能是()。
A.藏精气而不泻也
B.泻而不藏
C.传化物而不藏
D.满而不能实
E.以上均不是