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【单选题】Year after year a dedicated Swedish chemist worked to find a substance which, when (1)_____ nitroglycerine(硝化甘油), would make explosives safer to handle (2)_____ weakening their force. He had a persona...
A.
mixing with
B.
mixed with
C.
was mixing with
D.
was mixed with
【单选题】Year after year a dedicated Swedish chemist worked to find a substance which, when (1)_____ nitroglycerine(硝化甘油), would make explosives safer to handle (2)_____ weakening their force. He had a persona...
A.
called
B.
known
C.
by name
D.
named
【单选题】石灰窑燃烧温度太高，原因及处理方法不正确的是（）。
A.
太多的热量输入，减少热量输入
B.
过剩系数调整错误，调整过剩系数
C.
石灰结块，减少热量输入
D.
石灰石粒度小，提供合格的石灰石