What are five of the seven layers that are found in the OSI model?（）
第1题：
(A) be doing
(B) are doing
(C) done
(D) did
正确答案：A
解答参考：本句主要表示将来某个时刻正在进行的动作，所以用will be doing表示将来进行时。【译文】明天晚上七点你们在干什么?
第2题：
一____________?
一It's half past seven.
A. What time is it now
B. Can I help you
C. Where are you going
第3题：
How many dangerous sports does the author mention in this passage?
A． Three.
B． Five.
C． Six.
D． Seven.
第4题：
_______two seven five!
A.Work
B.Steer
C.Handle
D.Operate
第5题：
--- ____?
一It’s half past seven.
A.What time is it now
B.Can I help you
C.Where are yougoing
第6题：
A、On Tuesday
B、In the morning
C、At half past five
第7题：
--- What time will the next train leave?
--- ________.
A. Five people
B. At 8.19
C. At the railway station
第8题：
The rule of seven used by quality control engineers states that if a run of seven or more samples lays on one side of the process mean, then the process is out of control. What is the probability that this condition is the result of random variations.
A . 14.30%
B . 3.12%
C . 2.73%
D . 1.56%
E . 0.78%
第9题：
A.Right
B.Wrong
第10题：
In the open systems interconnection (OSI) reference model, "layer" means one of seven conceptually complete,(71) arranged groups of services, functions, and protocols, that extend across all open systems.Application layer provides means for the application(72) to access the OSI environment. Presentation layer provides for the selection of a common syntax for representing data.(73) layer provides the means necessary for cooperating presentation entities to organize and synchronize their dialog and to manage their data exchange. Transport layer provides a reliable end-to-end data transfer service. Network layer provides for the entities in the transport layer the means for transferring blocks of data, by(74) and switching through the network between the open systems in which those entities reside. Data link layer provides services to transfer data between network layer entities. Physical layer provides the mechanical, electrical, functional, and procedural means to establish, maintain and(75) physical connections for transfer of bits over a transmission medium.
A．rankly
B．levelly
C．layered
D．hierarchically