Could you please give me a hand? I can't complete the task on time your help.
A:without
B:under
C:with
D:for
Daming took two ____ (photo) of his father.
When she heard her son had been admitted to a key university,words couldn't ________ her excitement.
一水平抛出的小球落到一倾角为θ的斜面上时,其速度方向与斜面垂直,运动轨迹如图中虚线所示.小球在竖直方向下落的距离与在水平方向通过的距离之比是多少?