在显微镜下观察洋葱鳞片叶内表皮细胞和人的口腔上皮细胞时,都能看到的结构是( )
A:细胞壁
B:叶绿体
C:细胞核
D:液泡
阅读理解(Mr. Zhang is showing Wei Fang and Li Lei a modern factory.)Mr. Zhang: You can’t see many workers here, but you can see a lot of robots. Look, that robot has two big hands.Wei Fang: How strong it looks!Mr. Zhang: Yes. It does much work for us.Li Lei: There are so many big boxes here. What are the robots doing?Mr. Zhang: They are making fridges.Wei Fang: How fast they are working!Li Lei: How much time do they need to make a fridge, Mr. Zhang?Mr. Zhang: About five minutes.Wei Fang and Li Lei: Only five minutes! What a modern factory it is!
清朝后期,“处处皆关,关关有税。”“如有打造双桅五百石以上桅式船只出海者,不论官兵民人,调发边卫充军。”这反映了清朝( )
为下列句子排序.组成一段完整通顺的对话。
(____)A.Nice to meet you too.
(____)B.Where are you from?
(____)C.Mum,this is Mike.He is my new friend.
(____)D.I am from Canada.
(____)E.Hi,Mike.Nice to meet you.