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问题
单项选择题
桥梁中人行道板受力钢筋直径()。
A、最大为3mm
B、至少为4mm
C、不大于5mm
D、不小于6mm
答案
参考答案:D
选择题
The little boy came riding full speed down the motorway on his bicycle. _____ it was!
A. What a dangerous scene
B. What dangerous a scene
C. How a dangerous scene
D. How dangerous the scene
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判断题
皮带机安装中心线不直会造成皮带划坏。()
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