在ATM的信元结构中,它有多少个字节?其中信元头和信息域各占多少字节?
参考答案:
在ATM的信元结构中,它有53个字节,其中信元头5个字节,信息域48个字节。
根据图片及首字母提示补全下列单词,使短文内容完整、连贯。
Today is Christmas Day. My 1.h____________ is very beautiful. We have a
big 2.C____________ tree with a 3.s____________ on the top.
In the morning, I received (收到) many gifts, and Christmas 4.c____________.
I was very happy. " Who brought me these gifts, Mum? " I asked. “ 5.S____________
brought you last night." said Mum. But I don't think so. I think my Mum and Dad brought them.
They love me very much.
关于小肠液的叙述,下列哪项是错误的
A.小肠液由十二指肠腺和小肠腺所分泌B.成人每日分泌量1~3 LC.它是一种弱碱性液体D.它含有多种消化酶E.小肠液的分泌受神经和体液因素的影响