News report. Questions 1 to 3 are based on the passages you have just heard.[音频]
A new research on the composition of blood.
B. A new technology for heart attack risk prediction.
C. A new finding of reasons why heart attacks happen.
D. A new research on reducing death rate of heart attacks.
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A. They can help reduce heart attack rate.
B. They can help analyze images of the fat.
C. They are prone to cause heart attacks.
D. They often surround the blood vessel.
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A. It is more practical.
B. It is cheaper.
C. It is more sensitive.
D. It is more accurate.
Questions 4 to 5 are based on the passages you have just heard.
A. Two scientists have found how to convert plastic into petrol.
B. Two non-scientists have invented a plastic-to-fuel converter.
C. Two scientists have discovered cheaper fuel in remote countries.
D. Two non-scientists have proposed a solution to the energy crisis.
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A. The huge cost of the pollution treatment.
B. The technical barriers to melting plastic.
C. The harm caused in the process.
D. The plastic waste crisis in about five years.
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