A:1mol•L﹣1,60mL
B:0.5mol•L﹣1,80mL
C:0.5mol•L﹣1,40mL
D:1mol•L﹣1.80mL
- Lucy, what were you doing at nine last night?
- I ___________ the piano. I usually practice the piano at that time.
“亲朋无一字”的“字”与“家书抵万金”中“家书”都是指____
地球上的人类出现在( )
扩句。
①小女孩坐在墙角里。
②她擦火柴。