A:x﹣2y+7=0
B:2x+y﹣1=0
C:x﹣2y﹣5=0
D:2x+y﹣5=0
下列叙述,正确的是( )
This is mine black bike. That is Tom red bike. ____
用人工合成的脊髓灰质炎病毒初次感染小鼠后( )