ATM信元信头中，HEC字节只对（）进行差错控制，在网络中不对用户信息进行差错控制操作。
参考答案：信头
男，55岁，10年前有肝炎病史，近1个月肝区持续隐痛或胀痛，伴食欲减退，腹胀、恶心、乏力。查肝脏不规则肿大、压痛。
应首先考虑的疾病是（）。
A.肝硬化
B.原发性肝癌
C.肝血管瘤
D.肝炎活动期
E.肝脓肿
句型转换（10分，每空1分）
小题1:I also go to the cinema. (改为否定句)
I __________ go to the cinema, ___________.
小题2:He is going to take care of his grandma. （改为同义句）
He is going to _________ _________ his grandma.
小题3:He will come to ShangHai in a month. (就划线部分提问)
________ _________ will he come to ShangHai
小题4:she has been to the Summer Palace before. (变反意疑问句)
she has been to the summer Palace before, _______ _______?
小题5: Can you tell me how I can get to the station? （改为同义句）
Can you tell me _______ _______get to the station?
