A:0≤a<1
B:−1<a≤0
C:a≥1
D:a>0
She is _____English teacher.
She is reading _____book.
俄罗斯与我国有着很长的边界线,是我国的友好近邻。对其认识错误的是( )
鸟的体温不会随着环境的变化而改变,是____.