Mr. Liu teaches English. We like class very much.
A:me, he
B:me, her
C:us, his
D:us, her
给庄稼施肥主要是给植物的生长提供无机盐.(判断对错)
—I went for a job interview yesterday and I ______the result.
图中A′B′为物体AB通过平面镜所成的像,请根据平面镜成像的特点在图中画出平面镜,镜的背面用阴影斜线表示.
金属镍有广泛的用途,粗镍中含有少量Fe、Cu、Pt等杂质,可用电解法制备高纯度的镍(用NiSO4作电解质溶液).已知:氧化性Fe2+<Ni2+<Cu2+,下列叙述正确的是( )