机动车仪表板上(如图所示)亮,提示发电机向蓄电池充电。
参考答案:错
The first paragraph of this passage tells us about ______.
A.the rhythms of brain waves
B.the daily activities of sleep
C.the stages of sleep in cycles
D.the daily activities in cycles
简述长日照、短日照作物的概念,并各列举两种作物类型。