CaCO3经过分解炉后已全部分解。
参考答案:错
There is a park______our school. [ ]
A. in the neighborhood
B. in the neighborhood of
C. nearby
D. on the neighbor of
蝶板在阀体内绕固定轴旋转的阀门叫蝶阀,可分为法兰式、对夹式。