单项选择题
儿童的发展受多种因素的影响,包括()A.遗传 B.环境 C.教育 D.儿童的主观能动性
多项选择题儿童的发展受多种因素的影响,包括()
It was after he got what he had desired he realized it ...
单项选择题It was after he got what he had desired he realized it was not so important.
厌氧氨氧化作用的电子受体是( )。 A、硝酸盐氮 B、亚硝酸盐氮 C、氨氮 D、有机物
单项选择题厌氧氨氧化作用的电子受体是( )。 A、硝酸盐氮 B、亚硝酸盐氮 C、氨氮 D、有机物