故障的诊断通常按照()先简后繁,先外后内,分短查找的方法。
A.先听先看
B.先易后难
C.先摸后试
参考答案:B
She was reported by the hospital spokesman _____ excellent progress.
A.to make
B.to be making
C.made
D.having made
沉管灌注桩在施工过程中,拔管速度过快不会引起哪项问题()
A.缩颈
B.夹泥
C.断桩
D.吊脚桩