土葬单人墓占地多少平方米？双人墓占地多少平方米？
参考答案：
土葬埋葬遗体，单人墓占地不得超过6平方米，双人墓占地不得超过8平方米。
When I opened the door, I found my father sitting in his chair, completely ______ in the humorous stories he was reading.
A．absorbed
B．losing
C．attracted
D．addicted
EPON系统在以太网帧结构中新增（）用于在OLT上标识ONU。
A.CRC
B.FCS
C.LLID
D.MPCP
