It’s reported that the price of meat this month is ______ that of last month.

A．half as lower as

B．half lower than

C．lower half than

D．as half low as

消防员灭火防护胶靴经10kW/m²±1kW/m²辐射热通量辐照8min，靴面内表面温升不大于22℃。