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单选题The number of visits after 4 months is closest to ______% of the number of visits after 1 month.A 40B 45C 90D 105E 110

题目
单选题
The number of visits after 4 months is closest to ______% of the number of visits after 1 month.
A

40

B

45

C

90

D

105

E

110

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第1题：

Wernment , a large number of people____after the flood in 1991.

A: survived

B: suspended

C: suffered

D: subfected


参考答案： A

第2题：

Each life jacket light that has a non-replaceable power source must be replaced ______．

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B.every 12 months after initial installation

C.every 24 months after initial installation

D.on or before the expiration date of the power source


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第3题：

Which of the following can be a disadvantage of search agents?

A Lack of counseling.

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第4题：

平均访问页数的计算方式是？（）

  • A、Visits/UV
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  • D、Visits/Clicks

正确答案:C

第5题：

平均访问页数的计算方式是（）

  • A、pv/visits
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第6题：

What must the Master or person in charge of a ship enter in the logbook after conducting a boat drill?

A.Which survival craft was used in the drill

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第7题：

As the number of local residents' visits to public swimming facilities climbs,__________the demand for lifeguards to supervise them.

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答案：B
解析：
“as to”是至于，关于；“as long as”只要；“whereas”鉴于；“as does”有“一样，也是这样”的意思。由于当地居民参观公共游泳设施人数的攀升，所需要的监管居民的救生员数量也要有所提升。

第8题：

●Let us now see how randomization is done when a collision occurs.After a(71),time is divided into discrete slots whose length is equal to the worst-case round-trip propagation time on the ether(2τ). To accommodate the longest path allowed by Ethernet, the slot time has been set t0 512 bit times, or 51.2μsec.

After the first collision, each station waits either 0 or l (72) times before trying again. If two stations collide and each one picks the same random number, they will collide again. After the second collision, each one picks either 0,1,2,or 3 at random and waits that number of slot times. If a third collision occurs (the probability of this happening is 0.25), then the next time the number of slots to wait is chosen at (73) from the interval 0 to 23-1.

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B．collision

c．connection

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C．once

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第9题：

Scheduled preventative maintenance visits should be carried out：（）

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正确答案:B

第10题：

Which attribute of a JFS filesystem can NOT be changed after the filesystem is created？（）

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