A:蛋白质
B:核酸
C:光合作用色素
D:核糖体
⑴____There's the bus stop.
⑵____Red is stop.
⑶____Green is go.
⑷____The Happy Zoo is there.
⑸____Yellow is wait.
A. B. C.
D. E.
下列关于太阳活动叙述正确的是( )