氧化反应器顶部是()。
A、循环气反应区
B、循环气预热区
C、撤热介质预热区
D、撤热介质沸腾区
参考答案:B
.
Through the open window we saw on the floor the happy father lying ________ his stomach, his daughter riding excitedly on his back.
A.on
B.with
C.above
D.from
公布员工业绩可引发竞争激励。