侧向滑步推铅球最后用力动作是通过蹬腿、送髋、转体、挺胸、低头、推臂、拨球连贯动作将球 发布时间:2020-04-07 05:18 │ 来源:www.tikuol.com 题型:判断题 问题: 侧向滑步推铅球最后用力动作是通过蹬腿、送髋、转体、挺胸、低头、推臂、拨球连贯动作将球推出
题型:判断题 已知向量m=(1,-2)与n=(1,λ).(Ⅰ)若n在m方向上的投影为5,求λ的值;(Ⅱ)命题P:向量m与n的夹角为锐角;命题q:a=2b,其中向量a=(λ+2,λ2-cos2α),b=(12λ+1,λ2+sinα)(λ,α∈R).若“p或q”为真命题,“p且q”为假命题,求λ的取值范围. 查看答案
题型:判断题 _____ there are living creatures in the outer space as those on Earth hasn't been proved until now. [ ]A. How B. WhenC. Where D. Whether 查看答案