对流干燥过程是一个（）相结合的过程。
参考答案：传质和传热
—Lucy, I passed the English exam. It is not so difficult as I thought.
—______________. [ ]
A. Well done
B. Bad luck
C. What a pity
D. Congratulations
粒细胞减少症是指成人外周血中性粒细胞绝对数低于
A．0.5×109/L
B．1.0×109/L
C．4.0×109/L
D．3.5×109/L
E．2.0×109/L
