什么叫通风网络?按其连接形式分哪三种类型?
参考答案:
矿井或采区通风系统中风流分岔、汇合线路的结构形式叫做通风网络。通风网络中井巷风流的基本连接形式有串联、并联和角联三种。
有关霍奇金病R-S细胞的特点,错误的是
A.多核或双核的瘤巨细胞B.常见核分裂像C.核大呈空泡,核仁明显,周围有透明晕D.胞浆丰富,双色或嗜酸性
单词拼写。
1. The boy finally _____ (承认) having cheated in the examination.
2. His suggestions are well ______ (值得) considering.
3. I recognised him immediately he ______ (摘下) his dark glasses.
4. I think the handbag I bought yesterday was a real ______ (便宜货).
5. ______ (就我个人而言), I think mobile phones can offer much convenience to middle school students.