What was one feature of the Earth that contributed to the runaway freeze 750 million years
A. Carbon-dioxide levels in the oceans were low.
B. The continents were located close to the equator.
C. The movement of glaciers carried away large quantities of rock.
D. The level of greenhouse gases in the atmosphere was high.
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What does the professor imply about the effect of increasing imports？
A. It will eventually result in a decrease in exports.
B. It is not necessarily bad for the economy.
C. It creates domestic economic problems that are easily solved.
D. Its impact on the economy is immediately apparent.
国家建立健全农产品质量安全标准体系。农产品质量安全标准是 () 的技术规范
A. 选择性
B. 任意性
C. 强制性
D. 限制性
The report______him from all blame for the accident.
A. resolved
B. absolved
C. dissolved
D. solved
What is the possible relationship between the man and the woman？
A. Doctor and patient.
B. Husband and wife.
C. Father and daughter.
D. Teacher and student.
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