根据表格判断下列句子正(√)误(×)。

( ) 1. There is a chair in Peter's room.

( ) 2. There is a chair and a bed in Mike's room.

( ) 3. There is a closet and two end tables in John's room.

( ) 4. There is an air-conditioner in Amy's room.

( ) 5. There is a trash bin and a closet in Sarah's room.

某水域5次COD_Cr的监测浓度分别为：14.0mg/L、16.5mg/L、20.8mg/L、18.7mg/L、21.4mg/L，采用内梅罗法计算COD_Cr的监测统计代表值为（）。

A.17.9mg/L

B.18.3mg/L

C.19.9mg/L

D.20.4mg/L