A:病毒和柳树
B:细菌和草履虫
C:蓝藻和酵母菌
D:青蛙和酵母菌
读昼长随时间变化曲线图,完成各题。
咏“水”:____,____。(陆游《游山西村》)
500÷100=____
1700÷100=____
4600÷100=____
2300÷100=____
________number of students went to visit that school last Sunday.