洋葱鳞片叶表皮细胞比口腔上皮细胞多了( )
A:细胞壁和液泡
B:细胞壁和叶绿体
C:液泡和叶绿体
D:细胞壁、叶绿体和液泡
一个因数乘10,另一个因数除以10,它们的积不变.
I'd appreciate _______if you could come and help me once more and I always appreciate _______me with my English in the past.
为了帮助中国游客养成绿色旅游的习惯,政府制定了新规则。
The government has made new rules to help Chinese tourists to ____________________ of traveling in a green way.