问题
多项选择题
稳定塘净化过程的影响因素包括( )。
A．光照
B．温度
C．有机负荷
D．pH值和营养元素
答案
参考答案：A,B,C,D
解析：在稳定塘中，光照影响藻类的生长及水中溶解氧的变化；温度影响微生物的生物代谢作用；有机负荷对塘内细菌的繁殖及O2、CO2碳含量产生影响；pH值和营养元素可形成制约因素。
搜题请搜索小程序“爱下问搜题”
稳定塘净化过程的影响因素包括( )。
A．光照
B．温度
C．有机负荷
D．pH值和营养元素
参考答案：A,B,C,D
解析：在稳定塘中，光照影响藻类的生长及水中溶解氧的变化；温度影响微生物的生物代谢作用；有机负荷对塘内细菌的繁殖及O2、CO2碳含量产生影响；pH值和营养元素可形成制约因素。
Passage Two
| Jee Hock and Meng Kim were very good friends. Jee Hock could not see. He was blind. Meng Kim could not walk. He was lame. They lived in a village near a forest. Everyone in the village was going to a rich man’s dinner on the other side of the forest. Jee Hock and Meng Kim were anxious to attend the dinner too. Blind Jee Hock thought of a plan. He would carry Meng Kim. The lame man could tell him the way. Meng Kim said that the plan was a good one. On the way through the forest, Meng Kim saw a tiger. He did not tell Jee Hock about it. Instead, he quietly asked Jee Hock to carry him to the nearest tree. Upon reaching an over banging branch, Meng Kim quickly hauled himself up. Then the tiger roared. Jee Hock at once knew a tiger was near. He lay down quietly. The tiger came to him and sniffed his body. The tiger’s whiskers touched Jee Hook’s nose. At once Jee Hock sneezed, "Ah Choooooo!" The tiger was afraid and ran away. Then Meng Kim came down from the tree. He asked Jee Hock about the tiger. Jee Hock said that the tiger had told him to choose his friends wisely. |
Jee Hock knew the tiger was near. He ______.
A．went to sleep
B．cried
C．sat down and waited
D．lay down quietly