皮皮学，免费搜题
登录
搜题
【单选题】
如图所示,小球以 15 m/s 的水平初速度向一倾角为 37° 的斜面抛出,飞行一段时间后,恰好垂直撞在斜面上. ( 不计空气阻力, g 取 10 m/s 2 , sin 37° = 0.6 , cos 37° = 0.8 , tan 37° = ) 在这一过程中,A.
小球恰好垂直撞在斜面上表示末速度与水平方向成 37° 角
B.
小球在空中的飞行时间 1.25 s
C.
抛出点距撞击点的竖直高度 y=20 m
D.
小球撞到斜面时，小球在竖直方向上下落的距离 y 与在水平方向上通过的距离 x 之比 y:x=3:2
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Hed rather die a heroic death____________________(也不愿出卖同志)．
【单选题】-Was his father very strict with him when he was at school? -Yes．He hed never praised him()he became one of the topstudents in his grade．
A.
after
B.
unless
C.
until
D.
when
【简答题】/ hed/___
【简答题】A．whose B．she C．he D．who
【单选题】No sooner did he complete the job______he found hed made a disastrous mistake.
A.
when
B.
what
C.
than
D.
that
【简答题】A．Card B．She C．He D．They
【单选题】听力原文： If your boss asks you to work in Moscow this year, hed better offer you more money to do so — or even double that depending on where you live now. Thats because Moscow has just been found to be ...
A.
Tokyo.
B.
Hong Kong.
C.
Moscow.
D.
Sydney.
【单选题】I think hed like to stay at home this evening rather than_________ out.
A.
goes
B.
going
C.
gone
D.
go
相关题目：