Friday, October 4, 2024
问题:通常把从()到1000-1400km作为大气层的厚度。
Monday, August 19, 2024
问题:光化学烟雾是氮氧化合物和碳氧化合物在阳光照射下形成的。
Wednesday, November 13, 2024
Friday, October 4, 2024
问题:受污染的水体和土壤的重金属来源,主要是由()的排放所致。
Thursday, February 15, 2024
Friday, November 8, 2024
Saturday, June 15, 2024
Thursday, November 2, 2023
Wednesday, November 13, 2024
Friday, October 4, 2024
Thursday, March 21, 2024
Thursday, September 15, 2022
Thursday, November 2, 2023
问题:P为自养生物的生长速度,R为异养生物的生长速度,在氧垂曲线的分解内R>P。
Wednesday, November 13, 2024
Wednesday, February 8, 2023
Wednesday, February 8, 2023
问题:大量有机物排入水体后,引起死鱼的主要原因是()A、富营养化B、毒性C、悬浮物增加D、溶解氧下降
Monday, August 19, 2024
Wednesday, November 13, 2024
问题:西维因的羟基代谢物与植物体内的葡萄糖醛酸结合后毒性降低,此现象称为()A、生物活化B、生物降解C、初级解毒D、次级解毒
Friday, July 5, 2024
Sunday, February 25, 2024