—__________ computers are there in your class?

—There are forty-five, forty-four for students and one for the teacher.

A．Who

B．How much

C．How many

D．How

关于高、低应变法动力测桩的叙述，正确的是（）。

A.两者均采用一维应力波理论分析计算桩－土系统响应

B.两者均可检测桩身结构的完整性

C.两者均要求在检测前凿除灌注桩桩顶破碎层

D.两者均只实测速度（或加速度）信号