—So she does. I can't really tell _______.
A:how old is she
B:how old she is
C:how is she old
孝心是一句温馨的话语,轻抚父母疲惫的心灵;
孝心是一首悠扬的小曲,舒缓父母无言的痛楚;
孝心是____,
孝心是____。
如图是一台收音机的屏板,当向右调指针(图中黑块)时,所接收的电磁波( )
下列说法正确的是( )
双曲线x2-2y2=1的右焦点的坐标为( )