【多选题】关于各种活性污泥运行方式,下列说法正确的是()
A.
渐减曝气法克服了普通曝气池供氧与需氧之间的矛盾;
B.
吸附再生法适合处理溶解性有机物含量较高的废水;
C.
完全混合式曝气池克服了传统推流式曝气池不耐冲击负荷的缺点;
D.
AB法中B段曝气停留时间为30~60min。
【简答题】日常对话 A: Hello. this is Xiao Hui. Is that Wendy? B: 1 Oh, Xiao Hui. I'm very glad to hear your voice. I miss you very much. A: Me, too. 2 B: Not too bad. My grandparents were very happy to see me when ...
【简答题】根据短文内容补全句子,每空一词。 Hello, I'm Tom. I'm 12 years old. I am from the USA. I have a twin brother. He is Tim. He likes sports very much. He is not happy today. Because his leg hurts. He can't have P. E. cla...
【单选题】按照货物的性质分类,集装箱货物可以分为普通货物和特殊货物,以下属于特殊货物的是哪一类货物?
【单选题】李某,30岁,最近因孩子突然生病需要照顾,而她又是上班族,而且丈夫又正在出差,且家中也没有老人帮忙照看孩子,她一人不能在白天既照顾孩子又上班,因此觉得很无助及懊恼。下列哪项不是造成她这种角色适应不良的影响因素
【多选题】有机无毒物在厌氧微生物作用下的产物包括( )。
【简答题】下列关于光的说法中,正确的是( ) A .紫外线可用作夜视仪进行夜间侦查 B .雨后天空出现的彩虹是光的色散现象 C .红、黄、蓝三种色光按一定比例混合成白光 D .红外线发出红光,紫外线发出紫光 2 .下列说法中不属于紫外线功能的是( ) A .有助于合成人体维生素 D B .杀死微生物 C .诊断疾病 D .使荧光物质发光 3 .过量的太阳照射对人有害,轻则使皮肤粗糙,重则引发皮肤癌,这是...
【简答题】Listen to the dialogue again and fill in the blanks with the words you hear . May: Lisa won the first prize in our college's English speech contest . Mom: Really? That's really wonderful. I'm so happ...