阅读理解。

     Hello! This is my family. I'm David Green. I'm from England. My family is in Beijing. My father and mother work here. My father is a doctor and my mother is a teacher. I have a sister but no brothers. My sister and I

are students of a middle school in Beijing. We love China. My home is very nice. My family has a TV and a

computer. My room (房间) is big. I have a bed (床), a desk (桌子) and two chairs (椅子) in it. My books are

on my desk. I have an MP3 in my bag. There are some pictures on the wall. I like my room and I like these

pictures very much.

根据短文内容,判断正(T)误(F).

( )1. Four people are in David's family.

( )2. Mr. and Mrs. Green have a son and a daughter.

( )3. David's father works in a school in Beijing.

( )4. Two chairs and a desk are in David's room.

( )5. — Is an MP3 on David's desk? 

       — No, it isn't.

Burkitt淋巴瘤患者腮腺肿块活检。仔细观察其病变。

该肿瘤发生了何种分子遗传学改变（）

A.t（14；18）

B.t（4；18）

C.t（8；14）

D.t（16；12）

E.t（12；16）