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在抗震区,当采用框架？抗震墙结构,且采用预制楼、屋面板时,应采取措施保证楼、屋盖的整体性及其与抗震墙的可靠连接,当采用配筋现浇面层加强时,厚度不宜小于下列哪一个数值？()

A. 40mm
B. 50mm
C. 60mm
D. 80mm

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听力原文： President Clinton has proposed a 31 billion-dollar-plan to make college education more affordable for millions of American families. Mr. Clinton' s proposal calls for tax deductions and tax credits to ease educational costs for families making up to 120,000 dollars a year. The program is to be fully implemented by the year 2003. The plan also includes 35 million dollars for a program to encourage former students to complete their college degrees. Another 1. 1 billion dollars has been earmarked for education programs aimed at ethnic minorities and lower-income families.
______ will benefit from the 35 million-dollar program.

A. Ethnic minorities
B. Lower-income families
C. Former college students
D. African American families

经济适用住房开发商利润控制在()以下。

A. 3%
B. 5%
C. 2%
D. 8%

【B10】

A. which
B. who
C. what
D. when

如果进行胸外心脏按压，按压的频率每分钟至少为（）

A. 60次
B. 80次
C. 100次
D. 120次
E. 120次以上