对省煤器钢管安装前进行（）试验。
A、耐压
B、热应力
C、通球
D、打水
参考答案：C
根据“一种钢丝0.25米重0.5千克”可以求出每米钢丝重多少千克？列式是______；也可以求出每千克钢丝长多少米？列式是______．
I don't think he is a person you can _______ for help. [ ]
A. turn to
B. get to
C. look up to
D. take to
