What do we know about Carrel Smith？
A. He is a 63-year-old doctor studying the preventing of cancer.
B. He is working at M. D. Anderson Cancer Center and taking part in the trial.
C. He is wondering about taking selenium and vitamin E supplements in preventing cancer.
D. His ex-brother-in-law was diagnosed to have prostate cancer.
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It can be inferred from the passage that the public charging infrastructure
A. is critical at the start-up stage of electric vehicles.
B. has no influence on consumers" buying interest.
C. can greatly reduce the city"s pollutant emission.
D. should support the mass adoption of electric vehicles.
The word "cohort"(Line 5, Para.2)most probably means
A. group.
B. achievement.
C. order.
D. region.
How does the fierce competition of residency positions affect Oregon Health and Science University？
A. Professors change the content of their teaching.
B. They make alternations of their courses.
C. The technical support of the campus has been improved.
D. They enhance correspondence with other health care community.
Which of the following is true of IODP according to the passage？
A. It"s an investigation of the deep sea by the United States.
B. IODP means International Ocean Drilling Program.
C. The Japanese Component of IDOP has not drilled in 2 years.
D. IODP is now facing a setback.
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