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【单选题】
如果30个访问者在一个统计周期内访问同一网页200次,则A.
PV=30 ,UV=200
B.
PV=6000，UV=30
C.
PV=200，UV=6000
D.
PV=200，UV=30
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举一反三
【单选题】Spreading oil on the open sea has the effect of ______．
A.
Diminishing the height of the seas
B.
Lengthening the distance between successive crests
C.
Increasing the height of the seas
D.
Preventing the wave crests from breaking
【单选题】Which of the following statements concerning the role of the sea in Hemingway’s novella The Old Man and the Sea is NOT correct?
A.
Through the protagonist’s interactions with the sea, his character emerges.
B.
The sea provides glimpses of the depth of the protagonist’s knowledge.
C.
His struggle, resolve and pride are measured in terms of how far out into the gulf he sails.
D.
The sea symbolizes the benevolent side of nature.
【简答题】The dispute settlement system of UN Convention on the Law of the Sea．
【单选题】To be honest, this restaurant isn’t _________ that one we went to the other day.
A.
half as good as
B.
as half good as
C.
as good as half
D.
good as half as
【单选题】One day Pa went to town to ______.
A.
sell animals he had caught all winter and buy articles of daily use
B.
trade the furs of the wild animals he had caught
C.
do some urgent business in town and buy some food on the way
D.
buy some presents for the family since holidays were coming
【单选题】Of all the features of the sea cucumber, which of the following seems to fascinate the author most?
A.
What it does when threatened.
B.
Where it lives.
C.
How it hides from predators.
D.
What it eats.
【单选题】The average height of the surface of the sea for all stages of the tide over a 19 year period is called ______.
A.
mean high water
B.
mean low water
C.
half-tide level
D.
mean sea level
【单选题】The temperature(温度)of the top of the sea is higher than the temperature of the deep sea.
A.
Right.
B.
Wrong.
C.
Doesn't say.
【判断题】Four seas include the sea of meridians, the sea of vessels, the sea of bones,the sea of marrow.
A.
正确
B.
错误
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