I'm________about what I say because careless remarks are likely to hurt others' feelings.
A:enthusiastic
B:curious
C:doubtful
D:cautious
家庭电路简化后如图所示,观察该电路,下列说法中正确的是
函数f(x)的图象如图所示,下列数值排序正确的是( )
下列气候类型中,亚洲缺少的是( )