I don’t know what of students in that school is, but you can see there are of bikes and

I don’t know what of students in that school is, but you can see there are of bikes and e-bikes outside the gate.
A. a number, the number
B. a number, a number
C. the number, a number
D. the number, the number

A. a number, the numberB. a number, a number(答案→)C. the number, a number D. the number, the number解析：the number of 表示…数字，a number of 表示大量的，故选C

正好我需要