更多"What caused the scientists of Sydne"的相关试题:
[单项选择]______ in a famed university abroad was what his parents wished for.
[单项选择]The scientists found what the isolated roots need is （）
A. quite natural
B. sugar, minerals and vitamins
C. some rare vitamins
D. organic nitrogen compounds
[单项选择]What caused photosynthesis to stop
A. Thousands of species died of starvation.
B. Earthquake and tidal waves.
C. Massive volcanic eruptions and forest fires.
D. Tons of dust and pulverized rock blasted into the atmosphere and blocked out sunlight.
[单项选择]According to some scientists, what kind of people can benefit most from Tai Chi
A. Healthy but relatively inactive old people.
B. Active but relatively unhealthy old people.
C. Frail old people, just released from hospital.
D. Energetic young people.
[单项选择]The scientists have absolute freedom as to what research they think is the best to______
A. engage
B. devote
C. seek
D. pursue
[单项选择]What has caused the pollution problem
A. Careless methods of production.
B. Lack of consumer demand for environment friendly products.
C. Millions of tons of glass, paper, plastic and metal containers are produced.
D. Both[A]
[单项选择]What caused the blackout in July 1977
A. Excessive heat probably made people switch on too many electrical appliances.
B. Because of unemployment, some machines were not in proper working order.
C. During a storm, lightning damaged supply cables.
D. The passage does not mention the cause.
[单项选择]What caused the disaster at Lake Nyos
A. Terrorism.
B. Volcanic eruption.
C. Release of CO2 at a nearby lake.
D. A limnic eruption at Lake Nyos.
[单项选择]What social scientists have long felt puzzled about
A. The mortality rate can not be predicted.
B. The death toll remained stable year after year.
C. A quota for each type of death has not come into being.
D. People lost their lives every year for this or that reason.
