If a girl is________, she is liked or enjoyed by a large number of people.
A:popular
B:common
C:helpful
某生物兴趣小组为了验证“绿叶在光下制造淀粉”,进行了如图所示的实验操作(次序已打乱),请你结合所学知识回答下列有关问题:
甲
乙
进价(件/元)
22
30
售价(件/元)
29
40