一本数学书大约有一____页,一列火车大约有乘客一____人.
一辆小客车大约坐二____人.
已知不等式x﹣1≥0,此不等式的解集在数轴上表示为( )
比较图中的a、b、c、d四个琼脂块中生长素的含量()
The car ______ at the present speed until it reaches the foot of the mountain at about nine o'clock tonight.