运行时吸收塔浆液的固体不断浓度增大的原因?
参考答案:
原烟气穿过吸收塔时,蒸发并带走的吸收塔中的水分以及脱硫反应生成物带出水,将导致吸收塔浆液的固体浓度增大。
He ___________busy yesterday, or he __________you with your experiment.
A.was; had helped
B.was; would have helped
C.had been; would have helped
D.were; would have helped
下列各元素中,一定属于主族元素的是
A.X元素能形成+7价的含氧酸及其盐
B.Y元素原子核最外层电子数为2
C.Z元素的阴离子与同一周期惰性元素的原子结构相同
D.R元素的氧化物是两性氧化物