What do we know about Alcatraz prison?
A. It has been in use since 1934.
B. It was considered a strong prison.
C. It only kept killers and bank robbers.
D. It was considered the worst prison in America.
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What happened to the prisoners who tried to escape?
All of them were caught and put back to prison.
B. All of them were caught and were killed right away.
C. The five missing prisoners were eventually found.
D. The five missing prisoners were assumed to have died.
What happened to Alcatraz prison in 1963, 29 years after it was open?
A. It was officially closed in 1963.
B. It became a tourist attraction in 1963.
C. Twenty-nine prisoners tried to escape in 1963.
D. The sea salt began to damage the prison in 1963.
What can people do on Alcatraz Island today?
A. Watch a movie being filmed.
B. Visit the damaged lighthouse.
C. Take a tour in the famous prison.
D. Observe San Francisco from the island.
在“同伴教育对高血压患者服药依从性的影响”研究中，“同伴教育”是
A. 自变量
B. 因变量
C. 外变量
D. 干扰变量
E. 中介变量
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