A:日期相同,区时阿洛菲早
B:日期苏瓦早,区时两地相同
C:日期苏瓦早,区时阿洛菲早
D:日期苏瓦晚,区时阿洛菲早
看图片,选句子
A. Talk quietly.
B. Keep to the right.
C. What is Zhang Peng doing?
D. Keep your desk clean.
E. They are eating lunch.
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已知a,b,c满足c<b<a,且ac<0,则下列选项中一定成立的是( )
如图所示,其中利用了超声波的是( )