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单项选择题
多孔吸声材料对高频噪声有较好的吸声效果（）
A．对
B．错
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单项选择题
It’s that time of the year－graduation. The end of school year is nearly in sight, and it’s an especially big deal if you’re finishing high school or college.
One amazing（令人惊叹的）16-year-old Florida girl, Grace Bush, graduated from both high school and college this week！She actually got her college diploma（毕业证书）before her high school diploma. How’d she do that?
“Hard work and dedication（专心致志）,”she told a local TV news station, “have made me succeed in doing high school and college at the same time.” She started taking college courses when she was just 13. She would often get up at 5:30 a.m. and not finish until after 11 p.m.
Doing both at once is a huge achievement, but it has also helped her family save money. She’s one of the 9 children, all home-schooled until the age of 13．Her father is a math professor while her mother is a part-time history teacher in a high school. Grace Bush has earned her college degree in law, with a near perfect GPA of 3.8 and she hopes to become a lawyer one day, although her parents expect her to teach at university. By the way, she also plays basketball in her college team in her spare time.
What did the parents do to help Grace with her education?（ ）
A.Theysharedwithhercollegehistorylessons
B.Theymadeherinterestedinmath
C.Theytaughtheruntilshewas13
D.Theyhiredapart-timeteacher
多项选择题
下列符合董事、监事和高级管理人员的消极资格要件有（ ）。
A．无民事行为能力或限制民事行为能力
B．被剥夺政治权利终身
C．个人所负数额较大的债务到期未清偿的
D．曾经犯罪的
单项选择题
高分子防水卷材试样热处理尺寸变化率试验时,标明每边的中点作为试样处理前后测量时的参考点,在标准环境下测量两参考点的初始长度,在80℃±2℃的温度下恒温24h,取出垫板置于标准环境中调节（ ）,再测量横向和纵向上两参考点的长度。
A.16h
B.20h
C.8h
D.24h
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