has been exaggerated by some experts in the field
is underestimated by government organizations at different levels
poses a challenge to the technology of building reservoirs
is already serious in certain parts of the world
第1题:
What is the best title for this passage?
A. Six Stages for Repairing Sam's Bicycle.
B. Possible Steps of Problem-solving.
C. Necessities of Problem Analysis.
D. Importance of Analyzing a Problem.
第2题:
30. Which is the best title for the passage?
A. The Desert Problem
B. People Make Deserts
C. Green Plants and Grass
D. The Desert,the Tree and the Water
第3题:
A swift current occurring in a narrow passage connecting two large bodies of water,which is produced by the continuously changing difference in height of tide at the two ends of the passage,is called a ______.
A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
第4题:
第5题:
第6题:
It indicated that lighter isotopes of oxygen predominated at certain times.
It had far more gaps in its sequence than the record taken from rocks on land.
It indicated that climate shifts did not occur every 100,000 years.
It indicated that the ratios of oxygen 16 and oxygen 18 in ocean water were not consistent with those found in fresh water.
It stretched back for only a million years.
第7题:
An open vent in the cooling system
A fouled sea chest
A restricted water passage in the engine
Air entrained in the cooling water
第8题:
hydraulic current
rectilinear current
rotary current
harmonic current
第9题:
reflected back to space by snow and ice
concentrated at visible wavelengths
absorbed by carbon dioxide molecules
absorbed by atmospheric water vapor
第10题:
has been exaggerated by some experts in the field
is underestimated by government organizations at different levels
poses a challenge to the technology of building reservoirs
is already serious in certain parts of the world
第11题:
All the universities have banned the sale ofbottled water.
Plastic bottles may do harm to people's health.
The purchase of soft drinks will increase.
Bottled water is cheap and environment-friendly.
第12题:
Two contrasting views of a problem are presented.
A problem is examined and complementary solutions are proposed or offered.
Latest developments are outlined in order of importance.
An innovation is explained with its importance emphasized.
第13题:
What do we know about golf from the passage?
A. It is popular in Portugal and Spain
B. It causes water shortages around the world
C. It pollutes the earth with chemicals and wastes
D. It needs water and electricity to keep its courses green
第14题:
The problem of underground water is more serious because( )
[A] the underground water trickles away all the year round
[B] the underground water is hidden deep beneath the Earth
[C] the change of it must be controlled by the NASA's satellites
[D] the dramatic change of it might affect the gravitational field
第15题:
第16题:
第17题:
Such problem ()air, water, and noise pollutions are becoming more and more serious in some big cities.
Alike
Bas
Cof
Dabout
第18题:
Excessive cylinder liner
water in the fuel system
Cracked cylinder liner
Leaking lube oil cooler
第19题:
Petroleum, sunlight and wind power.
Gas, water and fossil fuels.
Coal, natural gas and hydropower.
Sunlight, water and wind power.
第20题:
hydraulic current
rectilinear current
rotary current
harmonic current
第21题:
To illustrate a problem with examples.
To provide tips for solving a problem.
To indicate the results of a problem.
To reveal the causes of a problem.
第22题:
like
as
of
about
第23题:
high firing pressure
overload of that particular cylinder
smoky exhaust
cooling water temperature rise
第24题:
Many universities ban or restrict the sale ofbottled water.
Many states ban or restrict the sale ofbottled water.
The bottled water industry is concerned about its decreasing sales.
Many people are opposed to the bottled water ban.