双轴对称工字形简支梁，有跨中荷载作用于腹板平面内，作用点位于

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问题单项选择题

双轴对称工字形简支梁，有跨中荷载作用于腹板平面内，作用点位于哪个位置时整体稳定性最好？（）

A.形心位置

B.上翼缘

C.下翼缘

D.形心与上翼缘之间

答案

参考答案：C

选择题

(2014·昆明质检)The five rings on the Olympic flag________the union of the five continents and the meeting of athletes from all over the world.

A．present　

B．deliver

C．represent　

D．resemble

填空题

用括号中所给词的正确形式填空。

1. Learning English has a lot of _____ (read) in China.

2. Can I have some _____ (many) food too?

3. My friend Elva is crazy about music. She is very _____ (music).

4. Betty is _____(help) and she _____(help) Mr Lu, a 75-year-old man, clean the

room every day.

5. Alan is very clever and can always answer questions _____ (correct).