取c（Na2S2O3）＝0.1mol∕L硫代硫酸钠标准溶液用煮沸冷却的蒸馏水稀释至10倍配成，其浓度不需要标定，用计算得出。（）
参考答案：对
Both sides have been at war for three years and it’s hoped that the talk can bring
end to the war as soon as possible.
A．the; the
B．the; an
C．/; an
D．/; the
为什么钻孔时要用冷却润滑液，它的作用是什么？
