A:20
B:28
C:30
D:31
下图是植物细胞的基本结构模式图,请填出植物细胞的各种结构名称。
①____②____③____
④.____⑤____⑥____
对下列性状产生原因的解释,符合达尔文自然选择学说的是( )
We have made a survey among 1,000 students from a middle school about their favorite food. students like fruits according to the form.
Kind of food
Chocolate
Banana
Cookie
Apple
Percentage(百分比)
Of the students
20%
30%
15%
?