炉冷却水中悬浮物含量不得大于(),否则应采取措施降低。
参考答案:200毫克/升
—I haven't got a mobile phone.
—I think you should have . It's useful for you.
A.one
B.this
C.that
D.it
韶山9型电力机车起动时黏着牵引力应不小于()。
A.86kN
B.186kN
C.286kN
D.386kN