A:y1<y2<0
B:y1>y2>0
C:y2<y1<0
D:y2>y1>0
Please ____ fruits and vegetables in a basin!
碳酸的酸性比硅酸强,某化学课外小组搜集了大量的证据证明硅酸的酸性弱于碳酸酸性。其中能证明硅酸的酸性弱于碳酸酸性的实验事实是( )
If you make a _________, you provide an idea or plan for someone to think about.