以下关于灰斗的技术要求描述正确的是（）。
A、每台炉除尘器灰斗总数量为6个，灰斗出灰口法兰标高相对除尘器0米暂定为3.5米
B、每个灰斗设有2个灰斗气化板，布置在灰斗中心线上，并避开捅灰孔。为了避免烟气短路，灰斗内装有阻流板，它的下部尽量距排灰口远些
C、灰斗斜壁与水平面的夹角为60°。相邻壁交角的内侧，作成圆弧型，圆角半径为200mm
D、灰斗有良好的保温措施，并装设灰斗加热装置，使其加热负荷保持灰斗壁温不低于120℃，且要高于烟气露点温度5-10℃
参考答案：A, B, C, D
| 完形填空。 | ||||
| China is a large country of agriculture (农业). We all know that there are more than 800 million 1 in China. China starts to 2 the science of agriculture much earlier 3 other countries in the world. 4 people in Europe and America were trying to shoot wild animals and birds for food, farmers in China were 5 the science of agriculture. For example, Jia Sixie, who lived in the Northern Wei period (386-534AD), 6 one of the farming pioneers. After he finished his work in government, he 7 home and spent his time on research into agriculture. He 8 information, did experiments and learnt from the experience of farmers. He wrote a book called Qi Min Yao Shu. The book 9 has 110000 words is about both farming and gardening. This book is 10 to be an important summary (概要) of the knowledge of farming. | ||||
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