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1年前
They didn't provide __________ for Mr. Brown, so he had to find a hotel to live in.
1年前
The teacher has told us something _____ we should do in the summer holiday.
1年前
某质点在Oxy平面上运动。t =0时,质点位于y轴上。它x方向运动的速度-时间图像如图甲所示,它在y方向的位移-时间图像如图乙所示,则( )
1年前
My mother has been to America twice. 对划线部分提问twice。
1年前