A:光学显微镜
B:电子显微镜
C:“跳蚤镜”
D:隧道扫描显微镜
①人闲____花落,夜静春山空。
②采____东篱下,悠然见南山。
③忽如一夜春风来,千树万树____花开。
俄罗斯的交通运输业主要是( )
There are ___ floors in the building and my home is on the ____ floor.
A.Taste the soup, Kitty. B. What do youhear? C. Smell the noodles, Ben.
D.What colour is the frog? E. It’snice.