挑战习题
1/5单选题
难度:

1.函数y=中,自变量x的取值范围是(  )
A x>1
B x≥1
C x>-2
D x≥-2
提示1:
IOagueaNruS6jOasoeagueW8j+eahOaAp+i0qOWSjOWIhuW8j+eahOaEj+S5ie+8jOiiq+W8gOaWueaVsOWkp+S6juaIluetieS6jjDvvIzliIbmr43kuI3nrYnkuo4w77yM5Y+v5Lul5rGC5Ye6eOeahOiMg+WbtA==
正确答案:QQ==
6Kej77ya5qC55o2u6aKY5oSP5b6X77yaeC0x77yeMO+8jDxicj7op6PlvpfvvJp477yeMS4gPGJyPuaVhemAiUEuIA==