纯氧曝气池的容积负荷通常为（）kgBOD/kgMLSS。
A.0.1～0.3
B.0.2～0.4
C.2.0～3.2
D.4～7
参考答案：C
1。civil A. racial B. agency C. fiction D. curtain
2. feast A. realize B. steady C. recreation D. decrease
3. lamp A. grasp B. balloon C. master D. guarantee
4. altitude A. butcher B. prejudice C. avenue D. budget
5. cheque A. chorus B. stomach C. chapter D. technology
什么叫淋巴组织？有哪两种存在形态？
