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我国荷载规范规定的基本风压是以当地比较空旷平坦的地面上离地10m高统计所得的( )年一遇10mⅠn平均最大风速为标准确定的。

A.10
B.30
C.50
D.100
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单项选择题
Many schools have their art programs removed in an effort to improve test scores and save money. However, some researchers believe that this is not correct. Students can master some basic skills in art class that they cannot find in a normal classroom.
Allow me to share why you have to take art class.
First and most important, it stimulates creativity（激发创造力）.Art schools encourage you to think outside the box and be creative enough to create something artistic. It can be used not only in art but in life, too.
Besides, it helps you make the right choice. In art class, you are usually free to do what you want. In every art class, you are required to make decisions that can determine what your painting will turn out to be.
In addition, students can learn the art of critical（批判性的）thinking as a skill of observation（观察）. For example, art students find ways to imagine. That is a skill they need to become better readers and problem settlers.
What is more, it is noted that the company's bosses are actively looking for employees who can think creatively. Creative thinking is one of the most important skills that students can learn in art courses.
Finally, students who are trained in art class have interesting mental habits. They learn how to work on a task for a long time and how to continue to work even if they are discouraged. They are better for creating a link between the classroom and the outside world. In addition, children who do art work are able to look back on their work and make judgments about themselves.
What is the most important quality students develop in art class?（　　
A.Determination
B.Carefulness
C.Creativity
D.Honesty
单项选择题
《混凝土结构设计规范》(GB50010-2010)中，提倡用以下( )钢筋作为我国钢筋混凝土结构的主力钢筋。
A.HPB235级钢筋
B.HRB335级钢筋
C.HRB400级钢筋
D.RRB400级钢筋
问答题
请举例说明，酒店的平行竞争者指哪些？
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