题目内容
（请给出正确答案）
[单选题]
At which lay er of the OSI model does the Spanning Tree Protocol （STP) operate at（）
A.Lay er 5
B.Lay er 4
C.Lay er 3
D.Lay er 2
E.Lay er 1
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A.set back
B.lay back
C.held up
D.kept down
更多“At which lay er of the OSI mod…”相关的问题
第2题
__________（没想到这只鸡根本不会下蛋)翻译
He spent almost all his money to buy the hen which was said to be able to lay gold eggs, ________________(没想到这只鸡根本不会下蛋)
第3题
What is true about prenups？A、They lay bare all one’s finances.B、It can sometimes save a
What is true about prenups？
A、They lay bare all one’s finances.
B、It can sometimes save a couple from a terrible marriage.
C、It sheds light on issues which could later widen and result in divorce.
D、It is often signed on free will.
第4题
Chickens raised in poultry farms are all of the following EXCEPT that __________.
A.A.they are fed on food which is little better than garbage
B.B.they live in very crowded condition
C.C.the eggs they lay lack vitamins
D.D.they are allowed to move about and eat freely
第6题
他这个人四处漂泊，我想他不会存钱的。He is a rolling stone, I don't think he can （）any money.
A.lay out
B.reserve
C.lay up
第7题
Which of the following points is NOT INCLUDED.in the passage？A．One of the major tasks of e
Which of the following points is NOT INCLUDED.in the passage？
A．One of the major tasks of education is to discover the most promising students.
B．In order to teach effectively, educators are requested to lay emphasis on one particular field.
C．Some subjects have been over-emphasized in public schools.
D．The progress of the society cannot merely rely on inventors.
第8题
I ___ to my mother about my health, because I didn’t want her to worry about me.
A.lay
B.laid
C.lie
D.lie
第9题
She can’t wait until she’s up and about. She _________ being in bed.
A.tires of
B.take off
C.relax
D.lay
