单选题
What has happened in the past half-century?
The population of 15 countries has reduced by more than half.
Many countries have made unprecedented economic progress.
Many countries are still struggling with underdevelopment.
Urbanization has been taking place at a fast pace.
单选题
Which of the four major sectors contributing to carbon emissions accounts for the largest share?
Industrial processes.
Residential and commercial buildings.
Transportation.
Electricity generation.
单选题
How much of the solar radiation can be converted into usable energy?
5％-10％.
10％-15％.
30％-45％.
40％-55％.
单选题
Which of the following is NOT taught in schools?
Written English.
Colloquial English.
Written Arabic.
Colloquial Arabic.
单选题
Which of the following is NOT true about many people who experience mental health problems?
They can get over them or learn to live with them.
They don’t receive the right kind of help.
They are kept away from their families and friends.
They receive unfair treatment from the professionals who should care for them.
单选题
What would happen to some countries if tourism stopped?
Their economies would be ruined.
It would keep their economies going.
There would be no more environmental pollution there.
People have no chance to travel there.
单选题
Compared with literature, communication stresses ______.
the use of good-patterned sentence structures
meaning effect rather than the pattern of a sentence
the flow of sound which contributes to the meaning
the playing of words instead of that of tones
单选题
Approximately how many of us will experience a mental health problem each year?
50%.
25%.
70%.
30%.
单选题
According to the passage, what would happen to healthy cells within 48 hours of exposure to radio waves?
The number of healthy cells will keep declining as more and more of them die.
The number of healthy cells will initially drop before recovering rapidly.
The number of healthy cells will be on steady increase throughout the process.
The scientists have not yet arrived at any conclusion on this issue.
单选题
Which of the following is NOT true about improved communication?
It can train more innovative producers.
It can promote commodity exchange.
It can promote health care.
It can promote the development of education.
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