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【单选题】
图中所示的创意书架，由两个支承柱、弹性织带和一块木板组成。两端的支承柱固定在墙上，弹性织带套在两根支承柱上，中间用一块木板撑起。下列受力分析中正确的是（）A.
支承柱受拉
B.
织带受压
C.
支承柱受压
D.
支承柱受弯曲
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皮皮学刷刷变学霸
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【单选题】听力原文： If you've been on campus for very long, I'm certain that you've already heard about this course. You may know that last semester about 50 percent of the students enrolled in my course failed it....
A.
10 points.
B.
2 points.
C.
15 points.
D.
5 points.
【单选题】听力原文： If you've been on campus for very long, I'm certain that you've already heard about this course. You may know that last semester about fifty percent, of the Students enrolled in my course failed...
A.
10 points.
B.
2 points.
C.
15 points:
D.
5 points.
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