减温器套管损坏时，损坏侧汽温不正常地（），两侧汽温差（），严重时减温器发生（）。
参考答案：下降、增大、水冲击
My English teacher is really ___．She is often seen working in her office far into the night．
A．warm-hearted
B．easy-going
C．hard-working
D．self-confident
焊装钩身磨耗板时应两侧段焊，焊波长度各为（）
A.20mm
B.30mm
C.40mm
hard-working