题目

听短文，选择最佳答案。 （1） It's a picture of ________. A . boys and girls B . desks and chairs C . a classroom （2） Where are the two pens? A . They are in the pencil case. B . They are on the teacher's desk. C . They aren't in the classroom. （3） How old is Linda? A . Ten. B . Eleven. C . Twelve. （4） Who is not in the picture? A . Mike. B . Miss Green. C . Linda. （5） Mike and Linda are ________. A . teacher and student B . brother and sister C . friends一列超短波波长为5m，该波频率是（　　） A．  15×108Hz B．  6×107Hz  C．