题干
32. Despite what I’d been told about the native people’s attitude towards strangers, ___
___ did I come across any rudeness.
A：in no time
B：at no time
C：in any time
D：at any time
答案(点此获取答案解析）
B
夹角为53°，则手受到的拉力和脚受到的作用力分别为（设手和脚受到的力的作用线或作用线的反向延长线均通过重心O，g=10m/s2.sin53°=0.8）